first commit

node_modules/mqtt-packet/.github/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [16.x, 18.x, 20.x]
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Use Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install
+        run: |
+          npm install
+
+      - name: Run tests
+        run: |
+          npm run ci

node_modules/mqtt-packet/CONTRIBUTING.md

@@ -0,0 +1,27 @@
+# mqtt-packet is an OPEN Open Source Project
+
+-----------------------------------------
+
+## What?
+
+Individuals making significant and valuable contributions are given commit-access to the project to contribute as they see fit. This project is more like an open wiki than a standard guarded open source project.
+
+## Rules
+
+There are a few basic ground-rules for contributors:
+
+1. **No `--force` pushes** or modifying the Git history in any way.
+1. **Non-master branches** ought to be used for ongoing work.
+1. **External API changes and significant modifications** ought to be subject to an **internal pull-request** to solicit feedback from other contributors.
+1. Internal pull-requests to solicit feedback are *encouraged* for any other non-trivial contribution but left to the discretion of the contributor.
+1. Contributors should attempt to adhere to the prevailing code-style.
+
+## Releases
+
+Declaring formal releases remains the prerogative of the project maintainer.
+
+## Changes to this arrangement
+
+This is an experiment and feedback is welcome! This document may also be subject to pull-requests or changes by contributors where you believe you have something valuable to add or change.
+
+-----------------------------------------

node_modules/mqtt-packet/LICENSE.md

@@ -0,0 +1,13 @@
+The MIT License (MIT)
+=====================
+
+Copyright (c) 2014-2017 mqtt-packet contributors
+---------------------------------------
+
+*mqtt-packet contributors listed at <https://github.com/mqttjs/mqtt-packet#contributors>*
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/mqtt-packet/README.md

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+mqtt-packet
+===========
+
+Encode and Decode MQTT 3.1.1, 5.0 packets the node way.
+
+[![JavaScript Style Guide](https://cdn.rawgit.com/feross/standard/master/badge.svg)](https://github.com/feross/standard)
+
+  * <a href="#installation">Installation</a>
+  * <a href="#examples">Examples</a>
+  * <a href="#packets">Packets</a>
+  * <a href="#api">API</a>
+  * <a href="#contributing">Contributing</a>
+  * <a href="#license">License &amp; copyright</a>
+
+This library is tested with node v6, v8, v10, v12 and v14. The last version to support
+older versions of node was mqtt-packet@4.1.2.
+
+Installation
+------------
+
+```bash
+npm install mqtt-packet --save
+```
+
+Examples
+--------
+
+### Generating
+
+```js
+const mqtt = require('mqtt-packet');
+const object = {
+  cmd: 'publish',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 10,
+  topic: 'test',
+  payload: 'test' // Can also be a Buffer
+};
+const opts = { protocolVersion: 4 }; // default is 4. Usually, opts is a connect packet
+
+console.log(mqtt.generate(object))
+// Prints:
+//
+// <Buffer 30 0a 00 04 74 65 73 74 74 65 73 74>
+//
+// Which is the same as:
+//
+// Buffer.from([
+//   48, 10, // Header (publish)
+//   0, 4, // Topic length
+//   116, 101, 115, 116, // Topic (test)
+//   116, 101, 115, 116 // Payload (test)
+// ])
+```
+
+### Parsing
+
+```js
+const mqtt = require('mqtt-packet');
+const opts = { protocolVersion: 4 }; // default is 4. Usually, opts is a connect packet
+const parser = mqtt.parser(opts);
+
+// Synchronously emits all the parsed packets
+parser.on('packet', packet => {
+  console.log(packet)
+  // Prints:
+  //
+  // {
+  //   cmd: 'publish',
+  //   retain: false,
+  //   qos: 0,
+  //   dup: false,
+  //   length: 10,
+  //   topic: 'test',
+  //   payload: <Buffer 74 65 73 74>
+  // }
+})
+
+parser.parse(Buffer.from([
+  48, 10, // Header (publish)
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  116, 101, 115, 116 // Payload (test)
+]))
+// Returns the number of bytes left in the parser
+```
+
+API
+---
+
+  * <a href="#generate"><code>mqtt#<b>generate()</b></code></a>
+  * <a href="#writeToStream"><code>mqtt#<b>writeToStream()</b></code></a>
+  * <a href="#parser"><code>mqtt#<b>parser()</b></code></a>
+
+<a name="generate">
+
+### mqtt.generate(object, [opts])
+
+Generates a `Buffer` containing an MQTT packet.
+The object must be one of the ones specified by the [packets](#packets)
+section. Throws an `Error` if a packet cannot be generated.
+
+<a name="writeToStream">
+
+### mqtt.writeToStream(object, stream, [opts])
+
+Writes the mqtt packet defined by `object` to the given stream.
+The object must be one of the ones specified by the [packets](#packets)
+section. Emits an `Error` on the stream if a packet cannot be generated.
+On node >= 0.12, this function automatically calls `cork()` on your stream,
+and then it calls `uncork()` on the next tick.
+By default cache for number buffers is enabled.
+It creates a list of buffers for faster write. To disable cache set `mqtt.writeToStream.cacheNumbers = false`.
+Should be set before any `writeToStream` calls.
+
+<a name="parser">
+
+### mqtt.parser([opts])
+
+Returns a new `Parser` object. `Parser` inherits from `EventEmitter` and
+will emit:
+
+  * `packet`, when a new packet is parsed, according to
+    [packets](#packets)
+  * `error`, if an error happens
+
+<a name="parse">
+
+#### Parser.parse(buffer)
+
+Parses a given `Buffer` and emits synchronously all the MQTT packets that
+are included. Returns the number of bytes left to parse.
+
+If an error happens, an `error` event will be emitted, but no `packet` events
+will be emitted after that. Calling `parse()` again clears the error and
+previous buffer, as if you created a new `Parser`.
+
+Packets
+-------
+
+This section describes the format of all packets emitted by the `Parser`
+and that you can input to `generate`.
+
+### Connect
+
+```js
+{
+  cmd: 'connect',
+  protocolId: 'MQTT', // Or 'MQIsdp' in MQTT 3.1 and 5.0
+  protocolVersion: 4, // Or 3 in MQTT 3.1, or 5 in MQTT 5.0
+  clean: true, // Can also be false
+  clientId: 'my-device',
+  keepalive: 0, // Seconds which can be any positive number, with 0 as the default setting
+  username: 'matteo',
+  password: Buffer.from('collina'), // Passwords are buffers
+  will: {
+    topic: 'mydevice/status',
+    payload: Buffer.from('dead'), // Payloads are buffers
+    properties: { // MQTT 5.0
+      willDelayInterval: 1234,
+      payloadFormatIndicator: false,
+      messageExpiryInterval: 4321,
+      contentType: 'test',
+      responseTopic: 'topic',
+      correlationData: Buffer.from([1, 2, 3, 4]),
+      userProperties: {
+        'test': 'test'
+      }
+    }
+  },
+  properties: { // MQTT 5.0 properties
+      sessionExpiryInterval: 1234,
+      receiveMaximum: 432,
+      maximumPacketSize: 100,
+      topicAliasMaximum: 456,
+      requestResponseInformation: true,
+      requestProblemInformation: true,
+      userProperties: {
+        'test': 'test'
+      },
+      authenticationMethod: 'test',
+      authenticationData: Buffer.from([1, 2, 3, 4])
+  }
+}
+```
+
+If `protocolVersion` is 3, `clientId` is mandatory and `generate` will throw if
+missing.
+
+If `password` or `will.payload` are passed as strings, they will
+automatically be converted into a `Buffer`.
+
+### Connack
+
+```js
+{
+  cmd: 'connack',
+  returnCode: 0, // Or whatever else you see fit MQTT < 5.0
+  sessionPresent: false, // Can also be true.
+  reasonCode: 0, // reason code MQTT 5.0
+  properties: { // MQTT 5.0 properties
+      sessionExpiryInterval: 1234,
+      receiveMaximum: 432,
+      maximumQoS: 1,
+      retainAvailable: true,
+      maximumPacketSize: 100,
+      assignedClientIdentifier: 'test',
+      topicAliasMaximum: 456,
+      reasonString: 'test',
+      userProperties: {
+        'test': 'test'
+      },
+      wildcardSubscriptionAvailable: true,
+      subscriptionIdentifiersAvailable: true,
+      sharedSubscriptionAvailable: false,
+      serverKeepAlive: 1234,
+      responseInformation: 'test',
+      serverReference: 'test',
+      authenticationMethod: 'test',
+      authenticationData: Buffer.from([1, 2, 3, 4])
+  }
+}
+```
+
+The only mandatory argument is `returnCode`, as `generate` will throw if
+missing.
+
+### Subscribe
+
+```js
+{
+  cmd: 'subscribe',
+  messageId: 42,
+  properties: { // MQTT 5.0 properties
+    subscriptionIdentifier: 145,
+    userProperties: {
+      test: 'test'
+    }
+  }
+  subscriptions: [{
+    topic: 'test',
+    qos: 0,
+    nl: false, // no Local MQTT 5.0 flag
+    rap: true, // Retain as Published MQTT 5.0 flag
+    rh: 1 // Retain Handling MQTT 5.0
+  }]
+}
+```
+
+All properties are mandatory.
+
+### Suback
+
+```js
+{
+  cmd: 'suback',
+  messageId: 42,
+  properties: { // MQTT 5.0 properties
+    reasonString: 'test',
+    userProperties: {
+      'test': 'test'
+    }
+  }
+  granted: [0, 1, 2, 128]
+}
+```
+
+All the granted qos __must__ be < 256, as they are encoded as UInt8.
+All properties are mandatory.
+
+### Unsubscribe
+
+```js
+{
+  cmd: 'unsubscribe',
+  messageId: 42,
+  properties: { // MQTT 5.0 properties
+    userProperties: {
+      'test': 'test'
+    }
+  }
+  unsubscriptions: [
+    'test',
+    'a/topic'
+  ]
+}
+```
+
+All properties are mandatory.
+
+### Unsuback
+
+```js
+{
+  cmd: 'unsuback',
+  messageId: 42,
+  properties: { // MQTT 5.0 properties
+    reasonString: 'test',
+    userProperties: {
+      'test': 'test'
+    }
+  }
+}
+```
+
+All properties are mandatory.
+
+### Publish
+
+```js
+{
+  cmd: 'publish',
+  messageId: 42,
+  qos: 2,
+  dup: false,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  retain: false,
+  properties: { // optional properties MQTT 5.0
+      payloadFormatIndicator: true,
+      messageExpiryInterval: 4321,
+      topicAlias: 100,
+      responseTopic: 'topic',
+      correlationData: Buffer.from([1, 2, 3, 4]),
+      userProperties: {
+        'test': 'test'
+      },
+      subscriptionIdentifier: 120, // can be an Array in message from broker, if message included in few another subscriptions
+      contentType: 'test'
+   }
+}
+```
+
+Only the `topic` property is mandatory.
+Both `topic` and `payload` can be `Buffer` objects instead of strings.
+`messageId` is mandatory for `qos > 0`.
+
+### Puback
+
+```js
+{
+  cmd: 'puback',
+  messageId: 42,
+  reasonCode: 16, // only for MQTT 5.0
+  properties: { // MQTT 5.0 properties
+      reasonString: 'test',
+      userProperties: {
+        'test': 'test'
+      }
+  }
+}
+```
+
+The only mandatory property is `messageId`, as `generate` will throw if
+missing.
+
+### Pubrec
+
+```js
+{
+  cmd: 'pubrec',
+  messageId: 42,
+  reasonCode: 16, // only for MQTT 5.0
+  properties: { // properties MQTT 5.0
+    reasonString: 'test',
+    userProperties: {
+      'test': 'test'
+    }
+  }
+}
+```
+
+The only mandatory property is `messageId`, as `generate` will throw if
+missing.
+
+### Pubrel
+
+```js
+{
+  cmd: 'pubrel',
+  messageId: 42,
+  reasonCode: 16, // only for MQTT 5.0
+  properties: { // properties MQTT 5.0
+     reasonString: 'test',
+     userProperties: {
+       'test': 'test'
+     }
+  }
+}
+```
+
+The only mandatory property is `messageId`, as `generate` will throw if
+missing.
+
+### Pubcomp
+
+```js
+{
+  cmd: 'pubcomp',
+  messageId: 42,
+  reasonCode: 16, // only for MQTT 5.0
+  properties: { // properties MQTT 5.0
+    reasonString: 'test',
+    userProperties: {
+       'test': 'test'
+    }
+  }
+}
+```
+
+The only mandatory property is `messageId`, as `generate` will throw if
+missing.
+
+### Pingreq
+
+```js
+{
+  cmd: 'pingreq'
+}
+```
+
+### Pingresp
+
+```js
+{
+  cmd: 'pingresp'
+}
+```
+
+### Disconnect
+
+```js
+{
+  cmd: 'disconnect',
+  reasonCode: 0, // MQTT 5.0 code
+  properties: { // properties MQTT 5.0
+     sessionExpiryInterval: 145,
+     reasonString: 'test',
+     userProperties: {
+       'test': 'test'
+     },
+     serverReference: 'test'
+  }
+}
+```
+
+### Auth
+
+```js
+{
+  cmd: 'auth',
+  reasonCode: 0, // MQTT 5.0 code
+  properties: { // properties MQTT 5.0
+     authenticationMethod: 'test',
+     authenticationData: Buffer.from([0, 1, 2, 3]),
+     reasonString: 'test',
+     userProperties: {
+       'test': 'test'
+     }
+  }
+}
+```
+
+<a name="contributing"></a>
+
+Contributing
+------------
+
+mqtt-packet is an **OPEN Open Source Project**. This means that:
+
+> Individuals making significant and valuable contributions are given commit-access to the project to contribute as they see fit. This project is more like an open wiki than a standard guarded open source project.
+
+See the [CONTRIBUTING.md](https://github.com/mqttjs/mqtt-packet/blob/master/CONTRIBUTING.md) file for more details.
+
+### Contributors
+
+mqtt-packet is only possible due to the excellent work of the following contributors:
+
+<table><tbody>
+<tr><th align="left">Matteo Collina</th><td><a href="https://github.com/mcollina">GitHub/mcollina</a></td><td><a href="http://twitter.com/matteocollina">Twitter/@matteocollina</a></td></tr>
+<tr><th align="left">Adam Rudd</th><td><a href="https://github.com/adamvr">GitHub/adamvr</a></td><td><a href="http://twitter.com/adam_vr">Twitter/@adam_vr</a></td></tr>
+<tr><th align="left">Peter Sorowka</th><td><a href="https://github.com/psorowka">GitHub/psorowka</a></td><td><a href="http://twitter.com/psorowka">Twitter/@psorowka</a></td></tr>
+<tr><th align="left">Siarhei Buntsevich</th><td><a href="https://github.com/scarry1992">GitHub/scarry1992</a></td></tr>
+</tbody></table>
+
+License
+-------
+
+MIT

node_modules/mqtt-packet/benchmarks/generate.js

@@ -0,0 +1,26 @@
+const mqtt = require('../')
+const max = 100000
+let i
+const buf = Buffer.from('test')
+
+// initialize it
+mqtt.generate({
+  cmd: 'publish',
+  topic: 'test',
+  payload: buf
+})
+
+const start = Date.now()
+
+for (i = 0; i < max; i++) {
+  mqtt.generate({
+    cmd: 'publish',
+    topic: 'test',
+    payload: buf
+  })
+}
+
+const time = Date.now() - start
+console.log('Total time', time)
+console.log('Total packets', max)
+console.log('Packet/s', max / time * 1000)

node_modules/mqtt-packet/benchmarks/generateNet.js

@@ -0,0 +1,50 @@
+const mqtt = require('../')
+const max = 1000000
+let i = 0
+const start = Date.now()
+let time
+const buf = Buffer.allocUnsafe(10)
+const net = require('net')
+const server = net.createServer(handle)
+let dest
+
+buf.fill('test')
+
+function handle (sock) {
+  sock.resume()
+}
+
+server.listen(0, () => {
+  dest = net.connect(server.address())
+
+  dest.on('connect', tickWait)
+  dest.on('drain', tickWait)
+  dest.on('finish', () => {
+    time = Date.now() - start
+    console.log('Total time', time)
+    console.log('Total packets', max)
+    console.log('Packet/s', max / time * 1000)
+    server.close()
+  })
+})
+
+function tickWait () {
+  // console.log('tickWait', i)
+  let res = true
+  // var toSend = new Buffer(5 + buf.length)
+
+  for (; i < max && res; i++) {
+    res = dest.write(mqtt.generate({
+      cmd: 'publish',
+      topic: 'test',
+      payload: buf
+    }))
+    // buf.copy(toSend, 5)
+    // res = dest.write(toSend, 'buffer')
+    // console.log(res)
+  }
+
+  if (i >= max) {
+    dest.end()
+  }
+}

node_modules/mqtt-packet/benchmarks/parse.js

@@ -0,0 +1,19 @@
+const mqtt = require('../')
+const parser = mqtt.parser()
+const max = 10000000
+let i
+const start = Date.now() / 1000
+
+for (i = 0; i < max; i++) {
+  parser.parse(Buffer.from([
+    48, 10, // Header (publish)
+    0, 4, // Topic length
+    116, 101, 115, 116, // Topic (test)
+    116, 101, 115, 116 // Payload (test)
+  ]))
+}
+
+const time = Date.now() / 1000 - start
+console.log('Total packets', max)
+console.log('Total time', Math.round(time * 100) / 100)
+console.log('Packet/s', max / time)

node_modules/mqtt-packet/benchmarks/writeToStream.js

@@ -0,0 +1,48 @@
+const mqtt = require('../')
+const max = 1000000
+let i = 0
+const start = Date.now()
+let time
+const buf = Buffer.allocUnsafe(10)
+const net = require('net')
+const server = net.createServer(handle)
+let dest
+
+function handle (sock) {
+  sock.resume()
+}
+
+buf.fill('test')
+
+server.listen(0, () => {
+  dest = net.connect(server.address())
+
+  dest.on('connect', tickWait)
+  dest.on('drain', tickWait)
+  dest.on('finish', () => {
+    time = Date.now() - start
+    console.log('Total time', time)
+    console.log('Total packets', max)
+    console.log('Packet/s', max / time * 1000)
+    server.close()
+  })
+})
+
+function tickWait () {
+  let res = true
+  // var toSend = new Buffer(5)
+
+  for (; i < max && res; i++) {
+    res = mqtt.writeToStream({
+      cmd: 'publish',
+      topic: 'test',
+      payload: buf
+    }, dest)
+    // dest.write(toSend, 'buffer')
+    // res = dest.write(buf, 'buffer')
+  }
+
+  if (i >= max) {
+    dest.end()
+  }
+}

node_modules/mqtt-packet/constants.js

@@ -0,0 +1,291 @@
+/* Protocol - protocol constants */
+const protocol = module.exports
+const { Buffer } = require('buffer')
+
+/* Command code => mnemonic */
+protocol.types = {
+  0: 'reserved',
+  1: 'connect',
+  2: 'connack',
+  3: 'publish',
+  4: 'puback',
+  5: 'pubrec',
+  6: 'pubrel',
+  7: 'pubcomp',
+  8: 'subscribe',
+  9: 'suback',
+  10: 'unsubscribe',
+  11: 'unsuback',
+  12: 'pingreq',
+  13: 'pingresp',
+  14: 'disconnect',
+  15: 'auth'
+}
+
+protocol.requiredHeaderFlags = {
+  1: 0, // 'connect'
+  2: 0, // 'connack'
+  4: 0, // 'puback'
+  5: 0, // 'pubrec'
+  6: 2, // 'pubrel'
+  7: 0, // 'pubcomp'
+  8: 2, // 'subscribe'
+  9: 0, // 'suback'
+  10: 2, // 'unsubscribe'
+  11: 0, // 'unsuback'
+  12: 0, // 'pingreq'
+  13: 0, // 'pingresp'
+  14: 0, // 'disconnect'
+  15: 0 // 'auth'
+}
+
+protocol.requiredHeaderFlagsErrors = {}
+for (const k in protocol.requiredHeaderFlags) {
+  const v = protocol.requiredHeaderFlags[k]
+  protocol.requiredHeaderFlagsErrors[k] = 'Invalid header flag bits, must be 0x' + v.toString(16) + ' for ' + protocol.types[k] + ' packet'
+}
+
+/* Mnemonic => Command code */
+protocol.codes = {}
+for (const k in protocol.types) {
+  const v = protocol.types[k]
+  protocol.codes[v] = k
+}
+
+/* Header */
+protocol.CMD_SHIFT = 4
+protocol.CMD_MASK = 0xF0
+protocol.DUP_MASK = 0x08
+protocol.QOS_MASK = 0x03
+protocol.QOS_SHIFT = 1
+protocol.RETAIN_MASK = 0x01
+
+/* Length */
+protocol.VARBYTEINT_MASK = 0x7F
+protocol.VARBYTEINT_FIN_MASK = 0x80
+protocol.VARBYTEINT_MAX = 268435455
+
+/* Connack */
+protocol.SESSIONPRESENT_MASK = 0x01
+protocol.SESSIONPRESENT_HEADER = Buffer.from([protocol.SESSIONPRESENT_MASK])
+protocol.CONNACK_HEADER = Buffer.from([protocol.codes.connack << protocol.CMD_SHIFT])
+
+/* Connect */
+protocol.USERNAME_MASK = 0x80
+protocol.PASSWORD_MASK = 0x40
+protocol.WILL_RETAIN_MASK = 0x20
+protocol.WILL_QOS_MASK = 0x18
+protocol.WILL_QOS_SHIFT = 3
+protocol.WILL_FLAG_MASK = 0x04
+protocol.CLEAN_SESSION_MASK = 0x02
+protocol.CONNECT_HEADER = Buffer.from([protocol.codes.connect << protocol.CMD_SHIFT])
+
+/* Properties */
+protocol.properties = {
+  sessionExpiryInterval: 17,
+  willDelayInterval: 24,
+  receiveMaximum: 33,
+  maximumPacketSize: 39,
+  topicAliasMaximum: 34,
+  requestResponseInformation: 25,
+  requestProblemInformation: 23,
+  userProperties: 38,
+  authenticationMethod: 21,
+  authenticationData: 22,
+  payloadFormatIndicator: 1,
+  messageExpiryInterval: 2,
+  contentType: 3,
+  responseTopic: 8,
+  correlationData: 9,
+  maximumQoS: 36,
+  retainAvailable: 37,
+  assignedClientIdentifier: 18,
+  reasonString: 31,
+  wildcardSubscriptionAvailable: 40,
+  subscriptionIdentifiersAvailable: 41,
+  sharedSubscriptionAvailable: 42,
+  serverKeepAlive: 19,
+  responseInformation: 26,
+  serverReference: 28,
+  topicAlias: 35,
+  subscriptionIdentifier: 11
+}
+protocol.propertiesCodes = {}
+for (const prop in protocol.properties) {
+  const id = protocol.properties[prop]
+  protocol.propertiesCodes[id] = prop
+}
+protocol.propertiesTypes = {
+  sessionExpiryInterval: 'int32',
+  willDelayInterval: 'int32',
+  receiveMaximum: 'int16',
+  maximumPacketSize: 'int32',
+  topicAliasMaximum: 'int16',
+  requestResponseInformation: 'byte',
+  requestProblemInformation: 'byte',
+  userProperties: 'pair',
+  authenticationMethod: 'string',
+  authenticationData: 'binary',
+  payloadFormatIndicator: 'byte',
+  messageExpiryInterval: 'int32',
+  contentType: 'string',
+  responseTopic: 'string',
+  correlationData: 'binary',
+  maximumQoS: 'int8',
+  retainAvailable: 'byte',
+  assignedClientIdentifier: 'string',
+  reasonString: 'string',
+  wildcardSubscriptionAvailable: 'byte',
+  subscriptionIdentifiersAvailable: 'byte',
+  sharedSubscriptionAvailable: 'byte',
+  serverKeepAlive: 'int16',
+  responseInformation: 'string',
+  serverReference: 'string',
+  topicAlias: 'int16',
+  subscriptionIdentifier: 'var'
+}
+
+function genHeader (type) {
+  return [0, 1, 2].map(qos => {
+    return [0, 1].map(dup => {
+      return [0, 1].map(retain => {
+        const buf = Buffer.alloc(1)
+        buf.writeUInt8(
+          protocol.codes[type] << protocol.CMD_SHIFT |
+          (dup ? protocol.DUP_MASK : 0) |
+          qos << protocol.QOS_SHIFT | retain, 0, true)
+        return buf
+      })
+    })
+  })
+}
+
+/* Publish */
+protocol.PUBLISH_HEADER = genHeader('publish')
+
+/* Subscribe */
+protocol.SUBSCRIBE_HEADER = genHeader('subscribe')
+protocol.SUBSCRIBE_OPTIONS_QOS_MASK = 0x03
+protocol.SUBSCRIBE_OPTIONS_NL_MASK = 0x01
+protocol.SUBSCRIBE_OPTIONS_NL_SHIFT = 2
+protocol.SUBSCRIBE_OPTIONS_RAP_MASK = 0x01
+protocol.SUBSCRIBE_OPTIONS_RAP_SHIFT = 3
+protocol.SUBSCRIBE_OPTIONS_RH_MASK = 0x03
+protocol.SUBSCRIBE_OPTIONS_RH_SHIFT = 4
+protocol.SUBSCRIBE_OPTIONS_RH = [0x00, 0x10, 0x20]
+protocol.SUBSCRIBE_OPTIONS_NL = 0x04
+protocol.SUBSCRIBE_OPTIONS_RAP = 0x08
+protocol.SUBSCRIBE_OPTIONS_QOS = [0x00, 0x01, 0x02]
+
+/* Unsubscribe */
+protocol.UNSUBSCRIBE_HEADER = genHeader('unsubscribe')
+
+/* Confirmations */
+protocol.ACKS = {
+  unsuback: genHeader('unsuback'),
+  puback: genHeader('puback'),
+  pubcomp: genHeader('pubcomp'),
+  pubrel: genHeader('pubrel'),
+  pubrec: genHeader('pubrec')
+}
+
+protocol.SUBACK_HEADER = Buffer.from([protocol.codes.suback << protocol.CMD_SHIFT])
+
+/* Protocol versions */
+protocol.VERSION3 = Buffer.from([3])
+protocol.VERSION4 = Buffer.from([4])
+protocol.VERSION5 = Buffer.from([5])
+protocol.VERSION131 = Buffer.from([131])
+protocol.VERSION132 = Buffer.from([132])
+
+/* QoS */
+protocol.QOS = [0, 1, 2].map(qos => {
+  return Buffer.from([qos])
+})
+
+/* Empty packets */
+protocol.EMPTY = {
+  pingreq: Buffer.from([protocol.codes.pingreq << 4, 0]),
+  pingresp: Buffer.from([protocol.codes.pingresp << 4, 0]),
+  disconnect: Buffer.from([protocol.codes.disconnect << 4, 0])
+}
+
+protocol.MQTT5_PUBACK_PUBREC_CODES = {
+  0x00: 'Success',
+  0x10: 'No matching subscribers',
+  0x80: 'Unspecified error',
+  0x83: 'Implementation specific error',
+  0x87: 'Not authorized',
+  0x90: 'Topic Name invalid',
+  0x91: 'Packet identifier in use',
+  0x97: 'Quota exceeded',
+  0x99: 'Payload format invalid'
+}
+
+protocol.MQTT5_PUBREL_PUBCOMP_CODES = {
+  0x00: 'Success',
+  0x92: 'Packet Identifier not found'
+}
+
+protocol.MQTT5_SUBACK_CODES = {
+  0x00: 'Granted QoS 0',
+  0x01: 'Granted QoS 1',
+  0x02: 'Granted QoS 2',
+  0x80: 'Unspecified error',
+  0x83: 'Implementation specific error',
+  0x87: 'Not authorized',
+  0x8F: 'Topic Filter invalid',
+  0x91: 'Packet Identifier in use',
+  0x97: 'Quota exceeded',
+  0x9E: 'Shared Subscriptions not supported',
+  0xA1: 'Subscription Identifiers not supported',
+  0xA2: 'Wildcard Subscriptions not supported'
+}
+
+protocol.MQTT5_UNSUBACK_CODES = {
+  0x00: 'Success',
+  0x11: 'No subscription existed',
+  0x80: 'Unspecified error',
+  0x83: 'Implementation specific error',
+  0x87: 'Not authorized',
+  0x8F: 'Topic Filter invalid',
+  0x91: 'Packet Identifier in use'
+}
+
+protocol.MQTT5_DISCONNECT_CODES = {
+  0x00: 'Normal disconnection',
+  0x04: 'Disconnect with Will Message',
+  0x80: 'Unspecified error',
+  0x81: 'Malformed Packet',
+  0x82: 'Protocol Error',
+  0x83: 'Implementation specific error',
+  0x87: 'Not authorized',
+  0x89: 'Server busy',
+  0x8B: 'Server shutting down',
+  0x8D: 'Keep Alive timeout',
+  0x8E: 'Session taken over',
+  0x8F: 'Topic Filter invalid',
+  0x90: 'Topic Name invalid',
+  0x93: 'Receive Maximum exceeded',
+  0x94: 'Topic Alias invalid',
+  0x95: 'Packet too large',
+  0x96: 'Message rate too high',
+  0x97: 'Quota exceeded',
+  0x98: 'Administrative action',
+  0x99: 'Payload format invalid',
+  0x9A: 'Retain not supported',
+  0x9B: 'QoS not supported',
+  0x9C: 'Use another server',
+  0x9D: 'Server moved',
+  0x9E: 'Shared Subscriptions not supported',
+  0x9F: 'Connection rate exceeded',
+  0xA0: 'Maximum connect time',
+  0xA1: 'Subscription Identifiers not supported',
+  0xA2: 'Wildcard Subscriptions not supported'
+}
+
+protocol.MQTT5_AUTH_CODES = {
+  0x00: 'Success',
+  0x18: 'Continue authentication',
+  0x19: 'Re-authenticate'
+}

node_modules/mqtt-packet/generate.js

@@ -0,0 +1,57 @@
+const writeToStream = require('./writeToStream')
+const { EventEmitter } = require('events')
+const { Buffer } = require('buffer')
+
+function generate (packet, opts) {
+  const stream = new Accumulator()
+  writeToStream(packet, stream, opts)
+  return stream.concat()
+}
+
+class Accumulator extends EventEmitter {
+  constructor () {
+    super()
+    this._array = new Array(20)
+    this._i = 0
+  }
+
+  write (chunk) {
+    this._array[this._i++] = chunk
+    return true
+  }
+
+  concat () {
+    let length = 0
+    const lengths = new Array(this._array.length)
+    const list = this._array
+    let pos = 0
+    let i
+
+    for (i = 0; i < list.length && list[i] !== undefined; i++) {
+      if (typeof list[i] !== 'string') lengths[i] = list[i].length
+      else lengths[i] = Buffer.byteLength(list[i])
+
+      length += lengths[i]
+    }
+
+    const result = Buffer.allocUnsafe(length)
+
+    for (i = 0; i < list.length && list[i] !== undefined; i++) {
+      if (typeof list[i] !== 'string') {
+        list[i].copy(result, pos)
+        pos += lengths[i]
+      } else {
+        result.write(list[i], pos)
+        pos += lengths[i]
+      }
+    }
+
+    return result
+  }
+
+  destroy (err) {
+    if (err) this.emit('error', err)
+  }
+}
+
+module.exports = generate

node_modules/mqtt-packet/mqtt.js

@@ -0,0 +1,3 @@
+exports.parser = require('./parser').parser
+exports.generate = require('./generate')
+exports.writeToStream = require('./writeToStream')

node_modules/mqtt-packet/node_modules/debug/LICENSE

@@ -0,0 +1,20 @@
+(The MIT License)
+
+Copyright (c) 2014-2017 TJ Holowaychuk <tj@vision-media.ca>
+Copyright (c) 2018-2021 Josh Junon
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+and associated documentation files (the 'Software'), to deal in the Software without restriction,
+including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial
+portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
+LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+

node_modules/mqtt-packet/node_modules/debug/README.md

@@ -0,0 +1,481 @@
+# debug
+[![OpenCollective](https://opencollective.com/debug/backers/badge.svg)](#backers)
+[![OpenCollective](https://opencollective.com/debug/sponsors/badge.svg)](#sponsors)
+
+<img width="647" src="https://user-images.githubusercontent.com/71256/29091486-fa38524c-7c37-11e7-895f-e7ec8e1039b6.png">
+
+A tiny JavaScript debugging utility modelled after Node.js core's debugging
+technique. Works in Node.js and web browsers.
+
+## Installation
+
+```bash
+$ npm install debug
+```
+
+## Usage
+
+`debug` exposes a function; simply pass this function the name of your module, and it will return a decorated version of `console.error` for you to pass debug statements to. This will allow you to toggle the debug output for different parts of your module as well as the module as a whole.
+
+Example [_app.js_](./examples/node/app.js):
+
+```js
+var debug = require('debug')('http')
+  , http = require('http')
+  , name = 'My App';
+
+// fake app
+
+debug('booting %o', name);
+
+http.createServer(function(req, res){
+  debug(req.method + ' ' + req.url);
+  res.end('hello\n');
+}).listen(3000, function(){
+  debug('listening');
+});
+
+// fake worker of some kind
+
+require('./worker');
+```
+
+Example [_worker.js_](./examples/node/worker.js):
+
+```js
+var a = require('debug')('worker:a')
+  , b = require('debug')('worker:b');
+
+function work() {
+  a('doing lots of uninteresting work');
+  setTimeout(work, Math.random() * 1000);
+}
+
+work();
+
+function workb() {
+  b('doing some work');
+  setTimeout(workb, Math.random() * 2000);
+}
+
+workb();
+```
+
+The `DEBUG` environment variable is then used to enable these based on space or
+comma-delimited names.
+
+Here are some examples:
+
+<img width="647" alt="screen shot 2017-08-08 at 12 53 04 pm" src="https://user-images.githubusercontent.com/71256/29091703-a6302cdc-7c38-11e7-8304-7c0b3bc600cd.png">
+<img width="647" alt="screen shot 2017-08-08 at 12 53 38 pm" src="https://user-images.githubusercontent.com/71256/29091700-a62a6888-7c38-11e7-800b-db911291ca2b.png">
+<img width="647" alt="screen shot 2017-08-08 at 12 53 25 pm" src="https://user-images.githubusercontent.com/71256/29091701-a62ea114-7c38-11e7-826a-2692bedca740.png">
+
+#### Windows command prompt notes
+
+##### CMD
+
+On Windows the environment variable is set using the `set` command.
+
+```cmd
+set DEBUG=*,-not_this
+```
+
+Example:
+
+```cmd
+set DEBUG=* & node app.js
+```
+
+##### PowerShell (VS Code default)
+
+PowerShell uses different syntax to set environment variables.
+
+```cmd
+$env:DEBUG = "*,-not_this"
+```
+
+Example:
+
+```cmd
+$env:DEBUG='app';node app.js
+```
+
+Then, run the program to be debugged as usual.
+
+npm script example:
+```js
+  "windowsDebug": "@powershell -Command $env:DEBUG='*';node app.js",
+```
+
+## Namespace Colors
+
+Every debug instance has a color generated for it based on its namespace name.
+This helps when visually parsing the debug output to identify which debug instance
+a debug line belongs to.
+
+#### Node.js
+
+In Node.js, colors are enabled when stderr is a TTY. You also _should_ install
+the [`supports-color`](https://npmjs.org/supports-color) module alongside debug,
+otherwise debug will only use a small handful of basic colors.
+
+<img width="521" src="https://user-images.githubusercontent.com/71256/29092181-47f6a9e6-7c3a-11e7-9a14-1928d8a711cd.png">
+
+#### Web Browser
+
+Colors are also enabled on "Web Inspectors" that understand the `%c` formatting
+option. These are WebKit web inspectors, Firefox ([since version
+31](https://hacks.mozilla.org/2014/05/editable-box-model-multiple-selection-sublime-text-keys-much-more-firefox-developer-tools-episode-31/))
+and the Firebug plugin for Firefox (any version).
+
+<img width="524" src="https://user-images.githubusercontent.com/71256/29092033-b65f9f2e-7c39-11e7-8e32-f6f0d8e865c1.png">
+
+
+## Millisecond diff
+
+When actively developing an application it can be useful to see when the time spent between one `debug()` call and the next. Suppose for example you invoke `debug()` before requesting a resource, and after as well, the "+NNNms" will show you how much time was spent between calls.
+
+<img width="647" src="https://user-images.githubusercontent.com/71256/29091486-fa38524c-7c37-11e7-895f-e7ec8e1039b6.png">
+
+When stdout is not a TTY, `Date#toISOString()` is used, making it more useful for logging the debug information as shown below:
+
+<img width="647" src="https://user-images.githubusercontent.com/71256/29091956-6bd78372-7c39-11e7-8c55-c948396d6edd.png">
+
+
+## Conventions
+
+If you're using this in one or more of your libraries, you _should_ use the name of your library so that developers may toggle debugging as desired without guessing names. If you have more than one debuggers you _should_ prefix them with your library name and use ":" to separate features. For example "bodyParser" from Connect would then be "connect:bodyParser".  If you append a "*" to the end of your name, it will always be enabled regardless of the setting of the DEBUG environment variable.  You can then use it for normal output as well as debug output.
+
+## Wildcards
+
+The `*` character may be used as a wildcard. Suppose for example your library has
+debuggers named "connect:bodyParser", "connect:compress", "connect:session",
+instead of listing all three with
+`DEBUG=connect:bodyParser,connect:compress,connect:session`, you may simply do
+`DEBUG=connect:*`, or to run everything using this module simply use `DEBUG=*`.
+
+You can also exclude specific debuggers by prefixing them with a "-" character.
+For example, `DEBUG=*,-connect:*` would include all debuggers except those
+starting with "connect:".
+
+## Environment Variables
+
+When running through Node.js, you can set a few environment variables that will
+change the behavior of the debug logging:
+
+| Name      | Purpose                                         |
+|-----------|-------------------------------------------------|
+| `DEBUG`   | Enables/disables specific debugging namespaces. |
+| `DEBUG_HIDE_DATE` | Hide date from debug output (non-TTY).  |
+| `DEBUG_COLORS`| Whether or not to use colors in the debug output. |
+| `DEBUG_DEPTH` | Object inspection depth.                    |
+| `DEBUG_SHOW_HIDDEN` | Shows hidden properties on inspected objects. |
+
+
+__Note:__ The environment variables beginning with `DEBUG_` end up being
+converted into an Options object that gets used with `%o`/`%O` formatters.
+See the Node.js documentation for
+[`util.inspect()`](https://nodejs.org/api/util.html#util_util_inspect_object_options)
+for the complete list.
+
+## Formatters
+
+Debug uses [printf-style](https://wikipedia.org/wiki/Printf_format_string) formatting.
+Below are the officially supported formatters:
+
+| Formatter | Representation |
+|-----------|----------------|
+| `%O`      | Pretty-print an Object on multiple lines. |
+| `%o`      | Pretty-print an Object all on a single line. |
+| `%s`      | String. |
+| `%d`      | Number (both integer and float). |
+| `%j`      | JSON. Replaced with the string '[Circular]' if the argument contains circular references. |
+| `%%`      | Single percent sign ('%'). This does not consume an argument. |
+
+
+### Custom formatters
+
+You can add custom formatters by extending the `debug.formatters` object.
+For example, if you wanted to add support for rendering a Buffer as hex with
+`%h`, you could do something like:
+
+```js
+const createDebug = require('debug')
+createDebug.formatters.h = (v) => {
+  return v.toString('hex')
+}
+
+// …elsewhere
+const debug = createDebug('foo')
+debug('this is hex: %h', new Buffer('hello world'))
+//   foo this is hex: 68656c6c6f20776f726c6421 +0ms
+```
+
+
+## Browser Support
+
+You can build a browser-ready script using [browserify](https://github.com/substack/node-browserify),
+or just use the [browserify-as-a-service](https://wzrd.in/) [build](https://wzrd.in/standalone/debug@latest),
+if you don't want to build it yourself.
+
+Debug's enable state is currently persisted by `localStorage`.
+Consider the situation shown below where you have `worker:a` and `worker:b`,
+and wish to debug both. You can enable this using `localStorage.debug`:
+
+```js
+localStorage.debug = 'worker:*'
+```
+
+And then refresh the page.
+
+```js
+a = debug('worker:a');
+b = debug('worker:b');
+
+setInterval(function(){
+  a('doing some work');
+}, 1000);
+
+setInterval(function(){
+  b('doing some work');
+}, 1200);
+```
+
+In Chromium-based web browsers (e.g. Brave, Chrome, and Electron), the JavaScript console will—by default—only show messages logged by `debug` if the "Verbose" log level is _enabled_.
+
+<img width="647" src="https://user-images.githubusercontent.com/7143133/152083257-29034707-c42c-4959-8add-3cee850e6fcf.png">
+
+## Output streams
+
+  By default `debug` will log to stderr, however this can be configured per-namespace by overriding the `log` method:
+
+Example [_stdout.js_](./examples/node/stdout.js):
+
+```js
+var debug = require('debug');
+var error = debug('app:error');
+
+// by default stderr is used
+error('goes to stderr!');
+
+var log = debug('app:log');
+// set this namespace to log via console.log
+log.log = console.log.bind(console); // don't forget to bind to console!
+log('goes to stdout');
+error('still goes to stderr!');
+
+// set all output to go via console.info
+// overrides all per-namespace log settings
+debug.log = console.info.bind(console);
+error('now goes to stdout via console.info');
+log('still goes to stdout, but via console.info now');
+```
+
+## Extend
+You can simply extend debugger 
+```js
+const log = require('debug')('auth');
+
+//creates new debug instance with extended namespace
+const logSign = log.extend('sign');
+const logLogin = log.extend('login');
+
+log('hello'); // auth hello
+logSign('hello'); //auth:sign hello
+logLogin('hello'); //auth:login hello
+```
+
+## Set dynamically
+
+You can also enable debug dynamically by calling the `enable()` method :
+
+```js
+let debug = require('debug');
+
+console.log(1, debug.enabled('test'));
+
+debug.enable('test');
+console.log(2, debug.enabled('test'));
+
+debug.disable();
+console.log(3, debug.enabled('test'));
+
+```
+
+print :   
+```
+1 false
+2 true
+3 false
+```
+
+Usage :  
+`enable(namespaces)`  
+`namespaces` can include modes separated by a colon and wildcards.
+   
+Note that calling `enable()` completely overrides previously set DEBUG variable : 
+
+```
+$ DEBUG=foo node -e 'var dbg = require("debug"); dbg.enable("bar"); console.log(dbg.enabled("foo"))'
+=> false
+```
+
+`disable()`
+
+Will disable all namespaces. The functions returns the namespaces currently
+enabled (and skipped). This can be useful if you want to disable debugging
+temporarily without knowing what was enabled to begin with.
+
+For example:
+
+```js
+let debug = require('debug');
+debug.enable('foo:*,-foo:bar');
+let namespaces = debug.disable();
+debug.enable(namespaces);
+```
+
+Note: There is no guarantee that the string will be identical to the initial
+enable string, but semantically they will be identical.
+
+## Checking whether a debug target is enabled
+
+After you've created a debug instance, you can determine whether or not it is
+enabled by checking the `enabled` property:
+
+```javascript
+const debug = require('debug')('http');
+
+if (debug.enabled) {
+  // do stuff...
+}
+```
+
+You can also manually toggle this property to force the debug instance to be
+enabled or disabled.
+
+## Usage in child processes
+
+Due to the way `debug` detects if the output is a TTY or not, colors are not shown in child processes when `stderr` is piped. A solution is to pass the `DEBUG_COLORS=1` environment variable to the child process.  
+For example:
+
+```javascript
+worker = fork(WORKER_WRAP_PATH, [workerPath], {
+  stdio: [
+    /* stdin: */ 0,
+    /* stdout: */ 'pipe',
+    /* stderr: */ 'pipe',
+    'ipc',
+  ],
+  env: Object.assign({}, process.env, {
+    DEBUG_COLORS: 1 // without this settings, colors won't be shown
+  }),
+});
+
+worker.stderr.pipe(process.stderr, { end: false });
+```
+
+
+## Authors
+
+ - TJ Holowaychuk
+ - Nathan Rajlich
+ - Andrew Rhyne
+ - Josh Junon
+
+## Backers
+
+Support us with a monthly donation and help us continue our activities. [[Become a backer](https://opencollective.com/debug#backer)]
+
+<a href="https://opencollective.com/debug/backer/0/website" target="_blank"><img src="https://opencollective.com/debug/backer/0/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/1/website" target="_blank"><img src="https://opencollective.com/debug/backer/1/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/2/website" target="_blank"><img src="https://opencollective.com/debug/backer/2/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/3/website" target="_blank"><img src="https://opencollective.com/debug/backer/3/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/4/website" target="_blank"><img src="https://opencollective.com/debug/backer/4/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/5/website" target="_blank"><img src="https://opencollective.com/debug/backer/5/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/6/website" target="_blank"><img src="https://opencollective.com/debug/backer/6/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/7/website" target="_blank"><img src="https://opencollective.com/debug/backer/7/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/8/website" target="_blank"><img src="https://opencollective.com/debug/backer/8/avatar.svg"></a>
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+<a href="https://opencollective.com/debug/backer/14/website" target="_blank"><img src="https://opencollective.com/debug/backer/14/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/15/website" target="_blank"><img src="https://opencollective.com/debug/backer/15/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/16/website" target="_blank"><img src="https://opencollective.com/debug/backer/16/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/17/website" target="_blank"><img src="https://opencollective.com/debug/backer/17/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/18/website" target="_blank"><img src="https://opencollective.com/debug/backer/18/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/19/website" target="_blank"><img src="https://opencollective.com/debug/backer/19/avatar.svg"></a>
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+<a href="https://opencollective.com/debug/backer/22/website" target="_blank"><img src="https://opencollective.com/debug/backer/22/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/23/website" target="_blank"><img src="https://opencollective.com/debug/backer/23/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/24/website" target="_blank"><img src="https://opencollective.com/debug/backer/24/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/25/website" target="_blank"><img src="https://opencollective.com/debug/backer/25/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/26/website" target="_blank"><img src="https://opencollective.com/debug/backer/26/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/27/website" target="_blank"><img src="https://opencollective.com/debug/backer/27/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/28/website" target="_blank"><img src="https://opencollective.com/debug/backer/28/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/29/website" target="_blank"><img src="https://opencollective.com/debug/backer/29/avatar.svg"></a>
+
+
+## Sponsors
+
+Become a sponsor and get your logo on our README on Github with a link to your site. [[Become a sponsor](https://opencollective.com/debug#sponsor)]
+
+<a href="https://opencollective.com/debug/sponsor/0/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/0/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/1/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/1/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/2/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/2/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/3/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/3/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/4/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/4/avatar.svg"></a>
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+<a href="https://opencollective.com/debug/sponsor/14/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/14/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/15/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/15/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/16/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/16/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/17/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/17/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/18/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/18/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/19/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/19/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/20/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/20/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/21/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/21/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/22/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/22/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/23/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/23/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/24/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/24/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/25/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/25/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/26/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/26/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/27/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/27/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/28/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/28/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/29/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/29/avatar.svg"></a>
+
+## License
+
+(The MIT License)
+
+Copyright (c) 2014-2017 TJ Holowaychuk &lt;tj@vision-media.ca&gt;
+Copyright (c) 2018-2021 Josh Junon
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/mqtt-packet/node_modules/debug/package.json

@@ -0,0 +1,64 @@
+{
+  "name": "debug",
+  "version": "4.4.1",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/debug-js/debug.git"
+  },
+  "description": "Lightweight debugging utility for Node.js and the browser",
+  "keywords": [
+    "debug",
+    "log",
+    "debugger"
+  ],
+  "files": [
+    "src",
+    "LICENSE",
+    "README.md"
+  ],
+  "author": "Josh Junon (https://github.com/qix-)",
+  "contributors": [
+    "TJ Holowaychuk <tj@vision-media.ca>",
+    "Nathan Rajlich <nathan@tootallnate.net> (http://n8.io)",
+    "Andrew Rhyne <rhyneandrew@gmail.com>"
+  ],
+  "license": "MIT",
+  "scripts": {
+    "lint": "xo",
+    "test": "npm run test:node && npm run test:browser && npm run lint",
+    "test:node": "mocha test.js test.node.js",
+    "test:browser": "karma start --single-run",
+    "test:coverage": "cat ./coverage/lcov.info | coveralls"
+  },
+  "dependencies": {
+    "ms": "^2.1.3"
+  },
+  "devDependencies": {
+    "brfs": "^2.0.1",
+    "browserify": "^16.2.3",
+    "coveralls": "^3.0.2",
+    "karma": "^3.1.4",
+    "karma-browserify": "^6.0.0",
+    "karma-chrome-launcher": "^2.2.0",
+    "karma-mocha": "^1.3.0",
+    "mocha": "^5.2.0",
+    "mocha-lcov-reporter": "^1.2.0",
+    "sinon": "^14.0.0",
+    "xo": "^0.23.0"
+  },
+  "peerDependenciesMeta": {
+    "supports-color": {
+      "optional": true
+    }
+  },
+  "main": "./src/index.js",
+  "browser": "./src/browser.js",
+  "engines": {
+    "node": ">=6.0"
+  },
+  "xo": {
+    "rules": {
+      "import/extensions": "off"
+    }
+  }
+}

node_modules/mqtt-packet/node_modules/debug/src/browser.js

@@ -0,0 +1,272 @@
+/* eslint-env browser */
+
+/**
+ * This is the web browser implementation of `debug()`.
+ */
+
+exports.formatArgs = formatArgs;
+exports.save = save;
+exports.load = load;
+exports.useColors = useColors;
+exports.storage = localstorage();
+exports.destroy = (() => {
+	let warned = false;
+
+	return () => {
+		if (!warned) {
+			warned = true;
+			console.warn('Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.');
+		}
+	};
+})();
+
+/**
+ * Colors.
+ */
+
+exports.colors = [
+	'#0000CC',
+	'#0000FF',
+	'#0033CC',
+	'#0033FF',
+	'#0066CC',
+	'#0066FF',
+	'#0099CC',
+	'#0099FF',
+	'#00CC00',
+	'#00CC33',
+	'#00CC66',
+	'#00CC99',
+	'#00CCCC',
+	'#00CCFF',
+	'#3300CC',
+	'#3300FF',
+	'#3333CC',
+	'#3333FF',
+	'#3366CC',
+	'#3366FF',
+	'#3399CC',
+	'#3399FF',
+	'#33CC00',
+	'#33CC33',
+	'#33CC66',
+	'#33CC99',
+	'#33CCCC',
+	'#33CCFF',
+	'#6600CC',
+	'#6600FF',
+	'#6633CC',
+	'#6633FF',
+	'#66CC00',
+	'#66CC33',
+	'#9900CC',
+	'#9900FF',
+	'#9933CC',
+	'#9933FF',
+	'#99CC00',
+	'#99CC33',
+	'#CC0000',
+	'#CC0033',
+	'#CC0066',
+	'#CC0099',
+	'#CC00CC',
+	'#CC00FF',
+	'#CC3300',
+	'#CC3333',
+	'#CC3366',
+	'#CC3399',
+	'#CC33CC',
+	'#CC33FF',
+	'#CC6600',
+	'#CC6633',
+	'#CC9900',
+	'#CC9933',
+	'#CCCC00',
+	'#CCCC33',
+	'#FF0000',
+	'#FF0033',
+	'#FF0066',
+	'#FF0099',
+	'#FF00CC',
+	'#FF00FF',
+	'#FF3300',
+	'#FF3333',
+	'#FF3366',
+	'#FF3399',
+	'#FF33CC',
+	'#FF33FF',
+	'#FF6600',
+	'#FF6633',
+	'#FF9900',
+	'#FF9933',
+	'#FFCC00',
+	'#FFCC33'
+];
+
+/**
+ * Currently only WebKit-based Web Inspectors, Firefox >= v31,
+ * and the Firebug extension (any Firefox version) are known
+ * to support "%c" CSS customizations.
+ *
+ * TODO: add a `localStorage` variable to explicitly enable/disable colors
+ */
+
+// eslint-disable-next-line complexity
+function useColors() {
+	// NB: In an Electron preload script, document will be defined but not fully
+	// initialized. Since we know we're in Chrome, we'll just detect this case
+	// explicitly
+	if (typeof window !== 'undefined' && window.process && (window.process.type === 'renderer' || window.process.__nwjs)) {
+		return true;
+	}
+
+	// Internet Explorer and Edge do not support colors.
+	if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\/(\d+)/)) {
+		return false;
+	}
+
+	let m;
+
+	// Is webkit? http://stackoverflow.com/a/16459606/376773
+	// document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
+	// eslint-disable-next-line no-return-assign
+	return (typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||
+		// Is firebug? http://stackoverflow.com/a/398120/376773
+		(typeof window !== 'undefined' && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||
+		// Is firefox >= v31?
+		// https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
+		(typeof navigator !== 'undefined' && navigator.userAgent && (m = navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/)) && parseInt(m[1], 10) >= 31) ||
+		// Double check webkit in userAgent just in case we are in a worker
+		(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
+}
+
+/**
+ * Colorize log arguments if enabled.
+ *
+ * @api public
+ */
+
+function formatArgs(args) {
+	args[0] = (this.useColors ? '%c' : '') +
+		this.namespace +
+		(this.useColors ? ' %c' : ' ') +
+		args[0] +
+		(this.useColors ? '%c ' : ' ') +
+		'+' + module.exports.humanize(this.diff);
+
+	if (!this.useColors) {
+		return;
+	}
+
+	const c = 'color: ' + this.color;
+	args.splice(1, 0, c, 'color: inherit');
+
+	// The final "%c" is somewhat tricky, because there could be other
+	// arguments passed either before or after the %c, so we need to
+	// figure out the correct index to insert the CSS into
+	let index = 0;
+	let lastC = 0;
+	args[0].replace(/%[a-zA-Z%]/g, match => {
+		if (match === '%%') {
+			return;
+		}
+		index++;
+		if (match === '%c') {
+			// We only are interested in the *last* %c
+			// (the user may have provided their own)
+			lastC = index;
+		}
+	});
+
+	args.splice(lastC, 0, c);
+}
+
+/**
+ * Invokes `console.debug()` when available.
+ * No-op when `console.debug` is not a "function".
+ * If `console.debug` is not available, falls back
+ * to `console.log`.
+ *
+ * @api public
+ */
+exports.log = console.debug || console.log || (() => {});
+
+/**
+ * Save `namespaces`.
+ *
+ * @param {String} namespaces
+ * @api private
+ */
+function save(namespaces) {
+	try {
+		if (namespaces) {
+			exports.storage.setItem('debug', namespaces);
+		} else {
+			exports.storage.removeItem('debug');
+		}
+	} catch (error) {
+		// Swallow
+		// XXX (@Qix-) should we be logging these?
+	}
+}
+
+/**
+ * Load `namespaces`.
+ *
+ * @return {String} returns the previously persisted debug modes
+ * @api private
+ */
+function load() {
+	let r;
+	try {
+		r = exports.storage.getItem('debug') || exports.storage.getItem('DEBUG') ;
+	} catch (error) {
+		// Swallow
+		// XXX (@Qix-) should we be logging these?
+	}
+
+	// If debug isn't set in LS, and we're in Electron, try to load $DEBUG
+	if (!r && typeof process !== 'undefined' && 'env' in process) {
+		r = process.env.DEBUG;
+	}
+
+	return r;
+}
+
+/**
+ * Localstorage attempts to return the localstorage.
+ *
+ * This is necessary because safari throws
+ * when a user disables cookies/localstorage
+ * and you attempt to access it.
+ *
+ * @return {LocalStorage}
+ * @api private
+ */
+
+function localstorage() {
+	try {
+		// TVMLKit (Apple TV JS Runtime) does not have a window object, just localStorage in the global context
+		// The Browser also has localStorage in the global context.
+		return localStorage;
+	} catch (error) {
+		// Swallow
+		// XXX (@Qix-) should we be logging these?
+	}
+}
+
+module.exports = require('./common')(exports);
+
+const {formatters} = module.exports;
+
+/**
+ * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
+ */
+
+formatters.j = function (v) {
+	try {
+		return JSON.stringify(v);
+	} catch (error) {
+		return '[UnexpectedJSONParseError]: ' + error.message;
+	}
+};

node_modules/mqtt-packet/node_modules/debug/src/common.js

@@ -0,0 +1,292 @@
+
+/**
+ * This is the common logic for both the Node.js and web browser
+ * implementations of `debug()`.
+ */
+
+function setup(env) {
+	createDebug.debug = createDebug;
+	createDebug.default = createDebug;
+	createDebug.coerce = coerce;
+	createDebug.disable = disable;
+	createDebug.enable = enable;
+	createDebug.enabled = enabled;
+	createDebug.humanize = require('ms');
+	createDebug.destroy = destroy;
+
+	Object.keys(env).forEach(key => {
+		createDebug[key] = env[key];
+	});
+
+	/**
+	* The currently active debug mode names, and names to skip.
+	*/
+
+	createDebug.names = [];
+	createDebug.skips = [];
+
+	/**
+	* Map of special "%n" handling functions, for the debug "format" argument.
+	*
+	* Valid key names are a single, lower or upper-case letter, i.e. "n" and "N".
+	*/
+	createDebug.formatters = {};
+
+	/**
+	* Selects a color for a debug namespace
+	* @param {String} namespace The namespace string for the debug instance to be colored
+	* @return {Number|String} An ANSI color code for the given namespace
+	* @api private
+	*/
+	function selectColor(namespace) {
+		let hash = 0;
+
+		for (let i = 0; i < namespace.length; i++) {
+			hash = ((hash << 5) - hash) + namespace.charCodeAt(i);
+			hash |= 0; // Convert to 32bit integer
+		}
+
+		return createDebug.colors[Math.abs(hash) % createDebug.colors.length];
+	}
+	createDebug.selectColor = selectColor;
+
+	/**
+	* Create a debugger with the given `namespace`.
+	*
+	* @param {String} namespace
+	* @return {Function}
+	* @api public
+	*/
+	function createDebug(namespace) {
+		let prevTime;
+		let enableOverride = null;
+		let namespacesCache;
+		let enabledCache;
+
+		function debug(...args) {
+			// Disabled?
+			if (!debug.enabled) {
+				return;
+			}
+
+			const self = debug;
+
+			// Set `diff` timestamp
+			const curr = Number(new Date());
+			const ms = curr - (prevTime || curr);
+			self.diff = ms;
+			self.prev = prevTime;
+			self.curr = curr;
+			prevTime = curr;
+
+			args[0] = createDebug.coerce(args[0]);
+
+			if (typeof args[0] !== 'string') {
+				// Anything else let's inspect with %O
+				args.unshift('%O');
+			}
+
+			// Apply any `formatters` transformations
+			let index = 0;
+			args[0] = args[0].replace(/%([a-zA-Z%])/g, (match, format) => {
+				// If we encounter an escaped % then don't increase the array index
+				if (match === '%%') {
+					return '%';
+				}
+				index++;
+				const formatter = createDebug.formatters[format];
+				if (typeof formatter === 'function') {
+					const val = args[index];
+					match = formatter.call(self, val);
+
+					// Now we need to remove `args[index]` since it's inlined in the `format`
+					args.splice(index, 1);
+					index--;
+				}
+				return match;
+			});
+
+			// Apply env-specific formatting (colors, etc.)
+			createDebug.formatArgs.call(self, args);
+
+			const logFn = self.log || createDebug.log;
+			logFn.apply(self, args);
+		}
+
+		debug.namespace = namespace;
+		debug.useColors = createDebug.useColors();
+		debug.color = createDebug.selectColor(namespace);
+		debug.extend = extend;
+		debug.destroy = createDebug.destroy; // XXX Temporary. Will be removed in the next major release.
+
+		Object.defineProperty(debug, 'enabled', {
+			enumerable: true,
+			configurable: false,
+			get: () => {
+				if (enableOverride !== null) {
+					return enableOverride;
+				}
+				if (namespacesCache !== createDebug.namespaces) {
+					namespacesCache = createDebug.namespaces;
+					enabledCache = createDebug.enabled(namespace);
+				}
+
+				return enabledCache;
+			},
+			set: v => {
+				enableOverride = v;
+			}
+		});
+
+		// Env-specific initialization logic for debug instances
+		if (typeof createDebug.init === 'function') {
+			createDebug.init(debug);
+		}
+
+		return debug;
+	}
+
+	function extend(namespace, delimiter) {
+		const newDebug = createDebug(this.namespace + (typeof delimiter === 'undefined' ? ':' : delimiter) + namespace);
+		newDebug.log = this.log;
+		return newDebug;
+	}
+
+	/**
+	* Enables a debug mode by namespaces. This can include modes
+	* separated by a colon and wildcards.
+	*
+	* @param {String} namespaces
+	* @api public
+	*/
+	function enable(namespaces) {
+		createDebug.save(namespaces);
+		createDebug.namespaces = namespaces;
+
+		createDebug.names = [];
+		createDebug.skips = [];
+
+		const split = (typeof namespaces === 'string' ? namespaces : '')
+			.trim()
+			.replace(/\s+/g, ',')
+			.split(',')
+			.filter(Boolean);
+
+		for (const ns of split) {
+			if (ns[0] === '-') {
+				createDebug.skips.push(ns.slice(1));
+			} else {
+				createDebug.names.push(ns);
+			}
+		}
+	}
+
+	/**
+	 * Checks if the given string matches a namespace template, honoring
+	 * asterisks as wildcards.
+	 *
+	 * @param {String} search
+	 * @param {String} template
+	 * @return {Boolean}
+	 */
+	function matchesTemplate(search, template) {
+		let searchIndex = 0;
+		let templateIndex = 0;
+		let starIndex = -1;
+		let matchIndex = 0;
+
+		while (searchIndex < search.length) {
+			if (templateIndex < template.length && (template[templateIndex] === search[searchIndex] || template[templateIndex] === '*')) {
+				// Match character or proceed with wildcard
+				if (template[templateIndex] === '*') {
+					starIndex = templateIndex;
+					matchIndex = searchIndex;
+					templateIndex++; // Skip the '*'
+				} else {
+					searchIndex++;
+					templateIndex++;
+				}
+			} else if (starIndex !== -1) { // eslint-disable-line no-negated-condition
+				// Backtrack to the last '*' and try to match more characters
+				templateIndex = starIndex + 1;
+				matchIndex++;
+				searchIndex = matchIndex;
+			} else {
+				return false; // No match
+			}
+		}
+
+		// Handle trailing '*' in template
+		while (templateIndex < template.length && template[templateIndex] === '*') {
+			templateIndex++;
+		}
+
+		return templateIndex === template.length;
+	}
+
+	/**
+	* Disable debug output.
+	*
+	* @return {String} namespaces
+	* @api public
+	*/
+	function disable() {
+		const namespaces = [
+			...createDebug.names,
+			...createDebug.skips.map(namespace => '-' + namespace)
+		].join(',');
+		createDebug.enable('');
+		return namespaces;
+	}
+
+	/**
+	* Returns true if the given mode name is enabled, false otherwise.
+	*
+	* @param {String} name
+	* @return {Boolean}
+	* @api public
+	*/
+	function enabled(name) {
+		for (const skip of createDebug.skips) {
+			if (matchesTemplate(name, skip)) {
+				return false;
+			}
+		}
+
+		for (const ns of createDebug.names) {
+			if (matchesTemplate(name, ns)) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	* Coerce `val`.
+	*
+	* @param {Mixed} val
+	* @return {Mixed}
+	* @api private
+	*/
+	function coerce(val) {
+		if (val instanceof Error) {
+			return val.stack || val.message;
+		}
+		return val;
+	}
+
+	/**
+	* XXX DO NOT USE. This is a temporary stub function.
+	* XXX It WILL be removed in the next major release.
+	*/
+	function destroy() {
+		console.warn('Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.');
+	}
+
+	createDebug.enable(createDebug.load());
+
+	return createDebug;
+}
+
+module.exports = setup;

node_modules/mqtt-packet/node_modules/debug/src/index.js

@@ -0,0 +1,10 @@
+/**
+ * Detect Electron renderer / nwjs process, which is node, but we should
+ * treat as a browser.
+ */
+
+if (typeof process === 'undefined' || process.type === 'renderer' || process.browser === true || process.__nwjs) {
+	module.exports = require('./browser.js');
+} else {
+	module.exports = require('./node.js');
+}

node_modules/mqtt-packet/node_modules/debug/src/node.js

@@ -0,0 +1,263 @@
+/**
+ * Module dependencies.
+ */
+
+const tty = require('tty');
+const util = require('util');
+
+/**
+ * This is the Node.js implementation of `debug()`.
+ */
+
+exports.init = init;
+exports.log = log;
+exports.formatArgs = formatArgs;
+exports.save = save;
+exports.load = load;
+exports.useColors = useColors;
+exports.destroy = util.deprecate(
+	() => {},
+	'Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.'
+);
+
+/**
+ * Colors.
+ */
+
+exports.colors = [6, 2, 3, 4, 5, 1];
+
+try {
+	// Optional dependency (as in, doesn't need to be installed, NOT like optionalDependencies in package.json)
+	// eslint-disable-next-line import/no-extraneous-dependencies
+	const supportsColor = require('supports-color');
+
+	if (supportsColor && (supportsColor.stderr || supportsColor).level >= 2) {
+		exports.colors = [
+			20,
+			21,
+			26,
+			27,
+			32,
+			33,
+			38,
+			39,
+			40,
+			41,
+			42,
+			43,
+			44,
+			45,
+			56,
+			57,
+			62,
+			63,
+			68,
+			69,
+			74,
+			75,
+			76,
+			77,
+			78,
+			79,
+			80,
+			81,
+			92,
+			93,
+			98,
+			99,
+			112,
+			113,
+			128,
+			129,
+			134,
+			135,
+			148,
+			149,
+			160,
+			161,
+			162,
+			163,
+			164,
+			165,
+			166,
+			167,
+			168,
+			169,
+			170,
+			171,
+			172,
+			173,
+			178,
+			179,
+			184,
+			185,
+			196,
+			197,
+			198,
+			199,
+			200,
+			201,
+			202,
+			203,
+			204,
+			205,
+			206,
+			207,
+			208,
+			209,
+			214,
+			215,
+			220,
+			221
+		];
+	}
+} catch (error) {
+	// Swallow - we only care if `supports-color` is available; it doesn't have to be.
+}
+
+/**
+ * Build up the default `inspectOpts` object from the environment variables.
+ *
+ *   $ DEBUG_COLORS=no DEBUG_DEPTH=10 DEBUG_SHOW_HIDDEN=enabled node script.js
+ */
+
+exports.inspectOpts = Object.keys(process.env).filter(key => {
+	return /^debug_/i.test(key);
+}).reduce((obj, key) => {
+	// Camel-case
+	const prop = key
+		.substring(6)
+		.toLowerCase()
+		.replace(/_([a-z])/g, (_, k) => {
+			return k.toUpperCase();
+		});
+
+	// Coerce string value into JS value
+	let val = process.env[key];
+	if (/^(yes|on|true|enabled)$/i.test(val)) {
+		val = true;
+	} else if (/^(no|off|false|disabled)$/i.test(val)) {
+		val = false;
+	} else if (val === 'null') {
+		val = null;
+	} else {
+		val = Number(val);
+	}
+
+	obj[prop] = val;
+	return obj;
+}, {});
+
+/**
+ * Is stdout a TTY? Colored output is enabled when `true`.
+ */
+
+function useColors() {
+	return 'colors' in exports.inspectOpts ?
+		Boolean(exports.inspectOpts.colors) :
+		tty.isatty(process.stderr.fd);
+}
+
+/**
+ * Adds ANSI color escape codes if enabled.
+ *
+ * @api public
+ */
+
+function formatArgs(args) {
+	const {namespace: name, useColors} = this;
+
+	if (useColors) {
+		const c = this.color;
+		const colorCode = '\u001B[3' + (c < 8 ? c : '8;5;' + c);
+		const prefix = `  ${colorCode};1m${name} \u001B[0m`;
+
+		args[0] = prefix + args[0].split('\n').join('\n' + prefix);
+		args.push(colorCode + 'm+' + module.exports.humanize(this.diff) + '\u001B[0m');
+	} else {
+		args[0] = getDate() + name + ' ' + args[0];
+	}
+}
+
+function getDate() {
+	if (exports.inspectOpts.hideDate) {
+		return '';
+	}
+	return new Date().toISOString() + ' ';
+}
+
+/**
+ * Invokes `util.formatWithOptions()` with the specified arguments and writes to stderr.
+ */
+
+function log(...args) {
+	return process.stderr.write(util.formatWithOptions(exports.inspectOpts, ...args) + '\n');
+}
+
+/**
+ * Save `namespaces`.
+ *
+ * @param {String} namespaces
+ * @api private
+ */
+function save(namespaces) {
+	if (namespaces) {
+		process.env.DEBUG = namespaces;
+	} else {
+		// If you set a process.env field to null or undefined, it gets cast to the
+		// string 'null' or 'undefined'. Just delete instead.
+		delete process.env.DEBUG;
+	}
+}
+
+/**
+ * Load `namespaces`.
+ *
+ * @return {String} returns the previously persisted debug modes
+ * @api private
+ */
+
+function load() {
+	return process.env.DEBUG;
+}
+
+/**
+ * Init logic for `debug` instances.
+ *
+ * Create a new `inspectOpts` object in case `useColors` is set
+ * differently for a particular `debug` instance.
+ */
+
+function init(debug) {
+	debug.inspectOpts = {};
+
+	const keys = Object.keys(exports.inspectOpts);
+	for (let i = 0; i < keys.length; i++) {
+		debug.inspectOpts[keys[i]] = exports.inspectOpts[keys[i]];
+	}
+}
+
+module.exports = require('./common')(exports);
+
+const {formatters} = module.exports;
+
+/**
+ * Map %o to `util.inspect()`, all on a single line.
+ */
+
+formatters.o = function (v) {
+	this.inspectOpts.colors = this.useColors;
+	return util.inspect(v, this.inspectOpts)
+		.split('\n')
+		.map(str => str.trim())
+		.join(' ');
+};
+
+/**
+ * Map %O to `util.inspect()`, allowing multiple lines if needed.
+ */
+
+formatters.O = function (v) {
+	this.inspectOpts.colors = this.useColors;
+	return util.inspect(v, this.inspectOpts);
+};

node_modules/mqtt-packet/node_modules/ms/index.js

@@ -0,0 +1,162 @@
+/**
+ * Helpers.
+ */
+
+var s = 1000;
+var m = s * 60;
+var h = m * 60;
+var d = h * 24;
+var w = d * 7;
+var y = d * 365.25;
+
+/**
+ * Parse or format the given `val`.
+ *
+ * Options:
+ *
+ *  - `long` verbose formatting [false]
+ *
+ * @param {String|Number} val
+ * @param {Object} [options]
+ * @throws {Error} throw an error if val is not a non-empty string or a number
+ * @return {String|Number}
+ * @api public
+ */
+
+module.exports = function (val, options) {
+  options = options || {};
+  var type = typeof val;
+  if (type === 'string' && val.length > 0) {
+    return parse(val);
+  } else if (type === 'number' && isFinite(val)) {
+    return options.long ? fmtLong(val) : fmtShort(val);
+  }
+  throw new Error(
+    'val is not a non-empty string or a valid number. val=' +
+      JSON.stringify(val)
+  );
+};
+
+/**
+ * Parse the given `str` and return milliseconds.
+ *
+ * @param {String} str
+ * @return {Number}
+ * @api private
+ */
+
+function parse(str) {
+  str = String(str);
+  if (str.length > 100) {
+    return;
+  }
+  var match = /^(-?(?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|weeks?|w|years?|yrs?|y)?$/i.exec(
+    str
+  );
+  if (!match) {
+    return;
+  }
+  var n = parseFloat(match[1]);
+  var type = (match[2] || 'ms').toLowerCase();
+  switch (type) {
+    case 'years':
+    case 'year':
+    case 'yrs':
+    case 'yr':
+    case 'y':
+      return n * y;
+    case 'weeks':
+    case 'week':
+    case 'w':
+      return n * w;
+    case 'days':
+    case 'day':
+    case 'd':
+      return n * d;
+    case 'hours':
+    case 'hour':
+    case 'hrs':
+    case 'hr':
+    case 'h':
+      return n * h;
+    case 'minutes':
+    case 'minute':
+    case 'mins':
+    case 'min':
+    case 'm':
+      return n * m;
+    case 'seconds':
+    case 'second':
+    case 'secs':
+    case 'sec':
+    case 's':
+      return n * s;
+    case 'milliseconds':
+    case 'millisecond':
+    case 'msecs':
+    case 'msec':
+    case 'ms':
+      return n;
+    default:
+      return undefined;
+  }
+}
+
+/**
+ * Short format for `ms`.
+ *
+ * @param {Number} ms
+ * @return {String}
+ * @api private
+ */
+
+function fmtShort(ms) {
+  var msAbs = Math.abs(ms);
+  if (msAbs >= d) {
+    return Math.round(ms / d) + 'd';
+  }
+  if (msAbs >= h) {
+    return Math.round(ms / h) + 'h';
+  }
+  if (msAbs >= m) {
+    return Math.round(ms / m) + 'm';
+  }
+  if (msAbs >= s) {
+    return Math.round(ms / s) + 's';
+  }
+  return ms + 'ms';
+}
+
+/**
+ * Long format for `ms`.
+ *
+ * @param {Number} ms
+ * @return {String}
+ * @api private
+ */
+
+function fmtLong(ms) {
+  var msAbs = Math.abs(ms);
+  if (msAbs >= d) {
+    return plural(ms, msAbs, d, 'day');
+  }
+  if (msAbs >= h) {
+    return plural(ms, msAbs, h, 'hour');
+  }
+  if (msAbs >= m) {
+    return plural(ms, msAbs, m, 'minute');
+  }
+  if (msAbs >= s) {
+    return plural(ms, msAbs, s, 'second');
+  }
+  return ms + ' ms';
+}
+
+/**
+ * Pluralization helper.
+ */
+
+function plural(ms, msAbs, n, name) {
+  var isPlural = msAbs >= n * 1.5;
+  return Math.round(ms / n) + ' ' + name + (isPlural ? 's' : '');
+}

node_modules/mqtt-packet/node_modules/ms/license.md

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2020 Vercel, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

node_modules/mqtt-packet/node_modules/ms/package.json

@@ -0,0 +1,38 @@
+{
+  "name": "ms",
+  "version": "2.1.3",
+  "description": "Tiny millisecond conversion utility",
+  "repository": "vercel/ms",
+  "main": "./index",
+  "files": [
+    "index.js"
+  ],
+  "scripts": {
+    "precommit": "lint-staged",
+    "lint": "eslint lib/* bin/*",
+    "test": "mocha tests.js"
+  },
+  "eslintConfig": {
+    "extends": "eslint:recommended",
+    "env": {
+      "node": true,
+      "es6": true
+    }
+  },
+  "lint-staged": {
+    "*.js": [
+      "npm run lint",
+      "prettier --single-quote --write",
+      "git add"
+    ]
+  },
+  "license": "MIT",
+  "devDependencies": {
+    "eslint": "4.18.2",
+    "expect.js": "0.3.1",
+    "husky": "0.14.3",
+    "lint-staged": "5.0.0",
+    "mocha": "4.0.1",
+    "prettier": "2.0.5"
+  }
+}

node_modules/mqtt-packet/node_modules/ms/readme.md

@@ -0,0 +1,59 @@
+# ms
+
+![CI](https://github.com/vercel/ms/workflows/CI/badge.svg)
+
+Use this package to easily convert various time formats to milliseconds.
+
+## Examples
+
+```js
+ms('2 days')  // 172800000
+ms('1d')      // 86400000
+ms('10h')     // 36000000
+ms('2.5 hrs') // 9000000
+ms('2h')      // 7200000
+ms('1m')      // 60000
+ms('5s')      // 5000
+ms('1y')      // 31557600000
+ms('100')     // 100
+ms('-3 days') // -259200000
+ms('-1h')     // -3600000
+ms('-200')    // -200
+```
+
+### Convert from Milliseconds
+
+```js
+ms(60000)             // "1m"
+ms(2 * 60000)         // "2m"
+ms(-3 * 60000)        // "-3m"
+ms(ms('10 hours'))    // "10h"
+```
+
+### Time Format Written-Out
+
+```js
+ms(60000, { long: true })             // "1 minute"
+ms(2 * 60000, { long: true })         // "2 minutes"
+ms(-3 * 60000, { long: true })        // "-3 minutes"
+ms(ms('10 hours'), { long: true })    // "10 hours"
+```
+
+## Features
+
+- Works both in [Node.js](https://nodejs.org) and in the browser
+- If a number is supplied to `ms`, a string with a unit is returned
+- If a string that contains the number is supplied, it returns it as a number (e.g.: it returns `100` for `'100'`)
+- If you pass a string with a number and a valid unit, the number of equivalent milliseconds is returned
+
+## Related Packages
+
+- [ms.macro](https://github.com/knpwrs/ms.macro) - Run `ms` as a macro at build-time.
+
+## Caught a Bug?
+
+1. [Fork](https://help.github.com/articles/fork-a-repo/) this repository to your own GitHub account and then [clone](https://help.github.com/articles/cloning-a-repository/) it to your local device
+2. Link the package to the global module directory: `npm link`
+3. Within the module you want to test your local development instance of ms, just link it to the dependencies: `npm link ms`. Instead of the default one from npm, Node.js will now use your clone of ms!
+
+As always, you can run the tests using: `npm test`

node_modules/mqtt-packet/numbers.js

@@ -0,0 +1,59 @@
+const { Buffer } = require('buffer')
+const max = 65536
+const cache = {}
+
+// in node 6 Buffer.subarray returns a Uint8Array instead of a Buffer
+// later versions return a Buffer
+// alternative is Buffer.slice but that creates a new buffer
+// creating new buffers takes time
+// SubOk is only false on node < 8
+const SubOk = Buffer.isBuffer(Buffer.from([1, 2]).subarray(0, 1))
+
+function generateBuffer (i) {
+  const buffer = Buffer.allocUnsafe(2)
+  buffer.writeUInt8(i >> 8, 0)
+  buffer.writeUInt8(i & 0x00FF, 0 + 1)
+
+  return buffer
+}
+
+function generateCache () {
+  for (let i = 0; i < max; i++) {
+    cache[i] = generateBuffer(i)
+  }
+}
+
+function genBufVariableByteInt (num) {
+  const maxLength = 4 // max 4 bytes
+  let digit = 0
+  let pos = 0
+  const buffer = Buffer.allocUnsafe(maxLength)
+
+  do {
+    digit = num % 128 | 0
+    num = num / 128 | 0
+    if (num > 0) digit = digit | 0x80
+
+    buffer.writeUInt8(digit, pos++)
+  } while (num > 0 && pos < maxLength)
+
+  if (num > 0) {
+    pos = 0
+  }
+
+  return SubOk ? buffer.subarray(0, pos) : buffer.slice(0, pos)
+}
+
+function generate4ByteBuffer (num) {
+  const buffer = Buffer.allocUnsafe(4)
+  buffer.writeUInt32BE(num, 0)
+  return buffer
+}
+
+module.exports = {
+  cache,
+  generateCache,
+  generateNumber: generateBuffer,
+  genBufVariableByteInt,
+  generate4ByteBuffer
+}

node_modules/mqtt-packet/package.json

@@ -0,0 +1,48 @@
+{
+  "name": "mqtt-packet",
+  "version": "9.0.2",
+  "description": "Parse and generate MQTT packets like a breeze",
+  "main": "mqtt.js",
+  "types": "types/index.d.ts",
+  "contributors": [
+    "Matteo Collina <matteo.collina@gmail.com> (https://github.com/mcollina)",
+    "Adam Rudd <damvrr@gmail.com>",
+    "Peter Sorowka (https://github.com/psorowka)",
+    "Wouter Klijn <contact@wuhkuh.com> (https://github.com/wuhkuh)",
+    "Siarhei Buntsevich (https://github.com/scarry1992)"
+  ],
+  "scripts": {
+    "test": "tape test.js | tap-spec && standard",
+    "ci": "tape test.js && node testRandom && standard"
+  },
+  "pre-commit": "test",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mqttjs/mqtt-packet.git"
+  },
+  "keywords": [
+    "MQTT",
+    "packet",
+    "parse",
+    "publish",
+    "subscribe",
+    "pubsub"
+  ],
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/mqttjs/mqtt-packet/issues"
+  },
+  "homepage": "https://github.com/mqttjs/mqtt-packet",
+  "devDependencies": {
+    "pre-commit": "^1.2.2",
+    "readable-stream": "^4.4.2",
+    "standard": "^17.1.0",
+    "tap-spec": "^5.0.0",
+    "tape": "^5.7.2"
+  },
+  "dependencies": {
+    "bl": "^6.0.8",
+    "debug": "^4.3.4",
+    "process-nextick-args": "^2.0.1"
+  }
+}

node_modules/mqtt-packet/packet.js

@@ -0,0 +1,13 @@
+class Packet {
+  constructor () {
+    this.cmd = null
+    this.retain = false
+    this.qos = 0
+    this.dup = false
+    this.length = -1
+    this.topic = null
+    this.payload = null
+  }
+}
+
+module.exports = Packet

node_modules/mqtt-packet/parser.js

@@ -0,0 +1,809 @@
+const bl = require('bl')
+const { EventEmitter } = require('events')
+const Packet = require('./packet')
+const constants = require('./constants')
+const debug = require('debug')('mqtt-packet:parser')
+
+class Parser extends EventEmitter {
+  constructor () {
+    super()
+    this.parser = this.constructor.parser
+  }
+
+  static parser (opt) {
+    if (!(this instanceof Parser)) return (new Parser()).parser(opt)
+
+    this.settings = opt || {}
+
+    this._states = [
+      '_parseHeader',
+      '_parseLength',
+      '_parsePayload',
+      '_newPacket'
+    ]
+
+    this._resetState()
+    return this
+  }
+
+  _resetState () {
+    debug('_resetState: resetting packet, error, _list, and _stateCounter')
+    this.packet = new Packet()
+    this.error = null
+    this._list = bl()
+    this._stateCounter = 0
+  }
+
+  parse (buf) {
+    if (this.error) this._resetState()
+
+    this._list.append(buf)
+    debug('parse: current state: %s', this._states[this._stateCounter])
+    while ((this.packet.length !== -1 || this._list.length > 0) &&
+      this[this._states[this._stateCounter]]() &&
+      !this.error) {
+      this._stateCounter++
+      debug('parse: state complete. _stateCounter is now: %d', this._stateCounter)
+      debug('parse: packet.length: %d, buffer list length: %d', this.packet.length, this._list.length)
+      if (this._stateCounter >= this._states.length) this._stateCounter = 0
+    }
+    debug('parse: exited while loop. packet: %d, buffer list length: %d', this.packet.length, this._list.length)
+    return this._list.length
+  }
+
+  _parseHeader () {
+    // There is at least one byte in the buffer
+    const zero = this._list.readUInt8(0)
+    const cmdIndex = zero >> constants.CMD_SHIFT
+    this.packet.cmd = constants.types[cmdIndex]
+    const headerFlags = zero & 0xf
+    const requiredHeaderFlags = constants.requiredHeaderFlags[cmdIndex]
+    if (requiredHeaderFlags != null && headerFlags !== requiredHeaderFlags) {
+      // Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+      return this._emitError(new Error(constants.requiredHeaderFlagsErrors[cmdIndex]))
+    }
+    this.packet.retain = (zero & constants.RETAIN_MASK) !== 0
+    this.packet.qos = (zero >> constants.QOS_SHIFT) & constants.QOS_MASK
+    if (this.packet.qos > 2) {
+      return this._emitError(new Error('Packet must not have both QoS bits set to 1'))
+    }
+    this.packet.dup = (zero & constants.DUP_MASK) !== 0
+    debug('_parseHeader: packet: %o', this.packet)
+
+    this._list.consume(1)
+
+    return true
+  }
+
+  _parseLength () {
+    // There is at least one byte in the list
+    const result = this._parseVarByteNum(true)
+
+    if (result) {
+      this.packet.length = result.value
+      this._list.consume(result.bytes)
+    }
+    debug('_parseLength %d', result.value)
+    return !!result
+  }
+
+  _parsePayload () {
+    debug('_parsePayload: payload %O', this._list)
+    let result = false
+
+    // Do we have a payload? Do we have enough data to complete the payload?
+    // PINGs have no payload
+    if (this.packet.length === 0 || this._list.length >= this.packet.length) {
+      this._pos = 0
+
+      switch (this.packet.cmd) {
+        case 'connect':
+          this._parseConnect()
+          break
+        case 'connack':
+          this._parseConnack()
+          break
+        case 'publish':
+          this._parsePublish()
+          break
+        case 'puback':
+        case 'pubrec':
+        case 'pubrel':
+        case 'pubcomp':
+          this._parseConfirmation()
+          break
+        case 'subscribe':
+          this._parseSubscribe()
+          break
+        case 'suback':
+          this._parseSuback()
+          break
+        case 'unsubscribe':
+          this._parseUnsubscribe()
+          break
+        case 'unsuback':
+          this._parseUnsuback()
+          break
+        case 'pingreq':
+        case 'pingresp':
+          // These are empty, nothing to do
+          break
+        case 'disconnect':
+          this._parseDisconnect()
+          break
+        case 'auth':
+          this._parseAuth()
+          break
+        default:
+          this._emitError(new Error('Not supported'))
+      }
+
+      result = true
+    }
+    debug('_parsePayload complete result: %s', result)
+    return result
+  }
+
+  _parseConnect () {
+    debug('_parseConnect')
+    let topic // Will topic
+    let payload // Will payload
+    let password // Password
+    let username // Username
+    const flags = {}
+    const packet = this.packet
+
+    // Parse protocolId
+    const protocolId = this._parseString()
+
+    if (protocolId === null) return this._emitError(new Error('Cannot parse protocolId'))
+    if (protocolId !== 'MQTT' && protocolId !== 'MQIsdp') {
+      return this._emitError(new Error('Invalid protocolId'))
+    }
+
+    packet.protocolId = protocolId
+
+    // Parse constants version number
+    if (this._pos >= this._list.length) return this._emitError(new Error('Packet too short'))
+
+    packet.protocolVersion = this._list.readUInt8(this._pos)
+
+    if (packet.protocolVersion >= 128) {
+      packet.bridgeMode = true
+      packet.protocolVersion = packet.protocolVersion - 128
+    }
+
+    if (packet.protocolVersion !== 3 && packet.protocolVersion !== 4 && packet.protocolVersion !== 5) {
+      return this._emitError(new Error('Invalid protocol version'))
+    }
+
+    this._pos++
+
+    if (this._pos >= this._list.length) {
+      return this._emitError(new Error('Packet too short'))
+    }
+
+    if (this._list.readUInt8(this._pos) & 0x1) {
+      // The Server MUST validate that the reserved flag in the CONNECT Control Packet is set to zero and disconnect the Client if it is not zero [MQTT-3.1.2-3]
+      return this._emitError(new Error('Connect flag bit 0 must be 0, but got 1'))
+    }
+    // Parse connect flags
+    flags.username = (this._list.readUInt8(this._pos) & constants.USERNAME_MASK)
+    flags.password = (this._list.readUInt8(this._pos) & constants.PASSWORD_MASK)
+    flags.will = (this._list.readUInt8(this._pos) & constants.WILL_FLAG_MASK)
+
+    const willRetain = !!(this._list.readUInt8(this._pos) & constants.WILL_RETAIN_MASK)
+    const willQos = (this._list.readUInt8(this._pos) &
+        constants.WILL_QOS_MASK) >> constants.WILL_QOS_SHIFT
+
+    if (flags.will) {
+      packet.will = {}
+      packet.will.retain = willRetain
+      packet.will.qos = willQos
+    } else {
+      if (willRetain) {
+        return this._emitError(new Error('Will Retain Flag must be set to zero when Will Flag is set to 0'))
+      }
+      if (willQos) {
+        return this._emitError(new Error('Will QoS must be set to zero when Will Flag is set to 0'))
+      }
+    }
+
+    packet.clean = (this._list.readUInt8(this._pos) & constants.CLEAN_SESSION_MASK) !== 0
+    this._pos++
+
+    // Parse keepalive
+    packet.keepalive = this._parseNum()
+    if (packet.keepalive === -1) return this._emitError(new Error('Packet too short'))
+
+    // parse properties
+    if (packet.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+    // Parse clientId
+    const clientId = this._parseString()
+    if (clientId === null) return this._emitError(new Error('Packet too short'))
+    packet.clientId = clientId
+    debug('_parseConnect: packet.clientId: %s', packet.clientId)
+
+    if (flags.will) {
+      if (packet.protocolVersion === 5) {
+        const willProperties = this._parseProperties()
+        if (Object.getOwnPropertyNames(willProperties).length) {
+          packet.will.properties = willProperties
+        }
+      }
+      // Parse will topic
+      topic = this._parseString()
+      if (topic === null) return this._emitError(new Error('Cannot parse will topic'))
+      packet.will.topic = topic
+      debug('_parseConnect: packet.will.topic: %s', packet.will.topic)
+
+      // Parse will payload
+      payload = this._parseBuffer()
+      if (payload === null) return this._emitError(new Error('Cannot parse will payload'))
+      packet.will.payload = payload
+      debug('_parseConnect: packet.will.paylaod: %s', packet.will.payload)
+    }
+
+    // Parse username
+    if (flags.username) {
+      username = this._parseString()
+      if (username === null) return this._emitError(new Error('Cannot parse username'))
+      packet.username = username
+      debug('_parseConnect: packet.username: %s', packet.username)
+    }
+
+    // Parse password
+    if (flags.password) {
+      password = this._parseBuffer()
+      if (password === null) return this._emitError(new Error('Cannot parse password'))
+      packet.password = password
+    }
+    // need for right parse auth packet and self set up
+    this.settings = packet
+    debug('_parseConnect: complete')
+    return packet
+  }
+
+  _parseConnack () {
+    debug('_parseConnack')
+    const packet = this.packet
+
+    if (this._list.length < 1) return null
+    const flags = this._list.readUInt8(this._pos++)
+    if (flags > 1) {
+      return this._emitError(new Error('Invalid connack flags, bits 7-1 must be set to 0'))
+    }
+    packet.sessionPresent = !!(flags & constants.SESSIONPRESENT_MASK)
+
+    if (this.settings.protocolVersion === 5) {
+      if (this._list.length >= 2) {
+        packet.reasonCode = this._list.readUInt8(this._pos++)
+      } else {
+        packet.reasonCode = 0
+      }
+    } else {
+      if (this._list.length < 2) return null
+      packet.returnCode = this._list.readUInt8(this._pos++)
+    }
+
+    if (packet.returnCode === -1 || packet.reasonCode === -1) return this._emitError(new Error('Cannot parse return code'))
+    // mqtt 5 properties
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+    debug('_parseConnack: complete')
+  }
+
+  _parsePublish () {
+    debug('_parsePublish')
+    const packet = this.packet
+    packet.topic = this._parseString()
+
+    if (packet.topic === null) return this._emitError(new Error('Cannot parse topic'))
+
+    // Parse messageId
+    if (packet.qos > 0) if (!this._parseMessageId()) { return }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    packet.payload = this._list.slice(this._pos, packet.length)
+    debug('_parsePublish: payload from buffer list: %o', packet.payload)
+  }
+
+  _parseSubscribe () {
+    debug('_parseSubscribe')
+    const packet = this.packet
+    let topic
+    let options
+    let qos
+    let rh
+    let rap
+    let nl
+    let subscription
+
+    packet.subscriptions = []
+
+    if (!this._parseMessageId()) { return }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    if (packet.length <= 0) { return this._emitError(new Error('Malformed subscribe, no payload specified')) }
+
+    while (this._pos < packet.length) {
+      // Parse topic
+      topic = this._parseString()
+      if (topic === null) return this._emitError(new Error('Cannot parse topic'))
+      if (this._pos >= packet.length) return this._emitError(new Error('Malformed Subscribe Payload'))
+
+      options = this._parseByte()
+
+      if (this.settings.protocolVersion === 5) {
+        if (options & 0xc0) {
+          return this._emitError(new Error('Invalid subscribe topic flag bits, bits 7-6 must be 0'))
+        }
+      } else {
+        if (options & 0xfc) {
+          return this._emitError(new Error('Invalid subscribe topic flag bits, bits 7-2 must be 0'))
+        }
+      }
+
+      qos = options & constants.SUBSCRIBE_OPTIONS_QOS_MASK
+      if (qos > 2) {
+        return this._emitError(new Error('Invalid subscribe QoS, must be <= 2'))
+      }
+      nl = ((options >> constants.SUBSCRIBE_OPTIONS_NL_SHIFT) & constants.SUBSCRIBE_OPTIONS_NL_MASK) !== 0
+      rap = ((options >> constants.SUBSCRIBE_OPTIONS_RAP_SHIFT) & constants.SUBSCRIBE_OPTIONS_RAP_MASK) !== 0
+      rh = (options >> constants.SUBSCRIBE_OPTIONS_RH_SHIFT) & constants.SUBSCRIBE_OPTIONS_RH_MASK
+
+      if (rh > 2) {
+        return this._emitError(new Error('Invalid retain handling, must be <= 2'))
+      }
+
+      subscription = { topic, qos }
+
+      // mqtt 5 options
+      if (this.settings.protocolVersion === 5) {
+        subscription.nl = nl
+        subscription.rap = rap
+        subscription.rh = rh
+      } else if (this.settings.bridgeMode) {
+        subscription.rh = 0
+        subscription.rap = true
+        subscription.nl = true
+      }
+
+      // Push pair to subscriptions
+      debug('_parseSubscribe: push subscription `%s` to subscription', subscription)
+      packet.subscriptions.push(subscription)
+    }
+  }
+
+  _parseSuback () {
+    debug('_parseSuback')
+    const packet = this.packet
+    this.packet.granted = []
+
+    if (!this._parseMessageId()) { return }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    if (packet.length <= 0) { return this._emitError(new Error('Malformed suback, no payload specified')) }
+
+    // Parse granted QoSes
+    while (this._pos < this.packet.length) {
+      const code = this._list.readUInt8(this._pos++)
+      if (this.settings.protocolVersion === 5) {
+        if (!constants.MQTT5_SUBACK_CODES[code]) {
+          return this._emitError(new Error('Invalid suback code'))
+        }
+      } else {
+        if (code > 2 && code !== 0x80) {
+          return this._emitError(new Error('Invalid suback QoS, must be 0, 1, 2 or 128'))
+        }
+      }
+      this.packet.granted.push(code)
+    }
+  }
+
+  _parseUnsubscribe () {
+    debug('_parseUnsubscribe')
+    const packet = this.packet
+
+    packet.unsubscriptions = []
+
+    // Parse messageId
+    if (!this._parseMessageId()) { return }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    if (packet.length <= 0) { return this._emitError(new Error('Malformed unsubscribe, no payload specified')) }
+
+    while (this._pos < packet.length) {
+      // Parse topic
+      const topic = this._parseString()
+      if (topic === null) return this._emitError(new Error('Cannot parse topic'))
+
+      // Push topic to unsubscriptions
+      debug('_parseUnsubscribe: push topic `%s` to unsubscriptions', topic)
+      packet.unsubscriptions.push(topic)
+    }
+  }
+
+  _parseUnsuback () {
+    debug('_parseUnsuback')
+    const packet = this.packet
+    if (!this._parseMessageId()) return this._emitError(new Error('Cannot parse messageId'))
+
+    if ((this.settings.protocolVersion === 3 ||
+      this.settings.protocolVersion === 4) && packet.length !== 2) {
+      return this._emitError(new Error('Malformed unsuback, payload length must be 2'))
+    }
+    if (packet.length <= 0) { return this._emitError(new Error('Malformed unsuback, no payload specified')) }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+      // Parse granted QoSes
+      packet.granted = []
+
+      while (this._pos < this.packet.length) {
+        const code = this._list.readUInt8(this._pos++)
+        if (!constants.MQTT5_UNSUBACK_CODES[code]) {
+          return this._emitError(new Error('Invalid unsuback code'))
+        }
+        this.packet.granted.push(code)
+      }
+    }
+  }
+
+  // parse packets like puback, pubrec, pubrel, pubcomp
+  _parseConfirmation () {
+    debug('_parseConfirmation: packet.cmd: `%s`', this.packet.cmd)
+    const packet = this.packet
+
+    this._parseMessageId()
+
+    if (this.settings.protocolVersion === 5) {
+      if (packet.length > 2) {
+        // response code
+        packet.reasonCode = this._parseByte()
+        switch (this.packet.cmd) {
+          case 'puback':
+          case 'pubrec':
+            if (!constants.MQTT5_PUBACK_PUBREC_CODES[packet.reasonCode]) {
+              return this._emitError(new Error('Invalid ' + this.packet.cmd + ' reason code'))
+            }
+            break
+          case 'pubrel':
+          case 'pubcomp':
+            if (!constants.MQTT5_PUBREL_PUBCOMP_CODES[packet.reasonCode]) {
+              return this._emitError(new Error('Invalid ' + this.packet.cmd + ' reason code'))
+            }
+            break
+        }
+        debug('_parseConfirmation: packet.reasonCode `%d`', packet.reasonCode)
+      } else {
+        packet.reasonCode = 0
+      }
+
+      if (packet.length > 3) {
+        // properies mqtt 5
+        const properties = this._parseProperties()
+        if (Object.getOwnPropertyNames(properties).length) {
+          packet.properties = properties
+        }
+      }
+    }
+
+    return true
+  }
+
+  // parse disconnect packet
+  _parseDisconnect () {
+    const packet = this.packet
+    debug('_parseDisconnect')
+
+    if (this.settings.protocolVersion === 5) {
+      // response code
+      if (this._list.length > 0) {
+        packet.reasonCode = this._parseByte()
+        if (!constants.MQTT5_DISCONNECT_CODES[packet.reasonCode]) {
+          this._emitError(new Error('Invalid disconnect reason code'))
+        }
+      } else {
+        packet.reasonCode = 0
+      }
+      // properies mqtt 5
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    debug('_parseDisconnect result: true')
+    return true
+  }
+
+  // parse auth packet
+  _parseAuth () {
+    debug('_parseAuth')
+    const packet = this.packet
+
+    if (this.settings.protocolVersion !== 5) {
+      return this._emitError(new Error('Not supported auth packet for this version MQTT'))
+    }
+
+    // response code
+    packet.reasonCode = this._parseByte()
+    if (!constants.MQTT5_AUTH_CODES[packet.reasonCode]) {
+      return this._emitError(new Error('Invalid auth reason code'))
+    }
+    // properies mqtt 5
+    const properties = this._parseProperties()
+    if (Object.getOwnPropertyNames(properties).length) {
+      packet.properties = properties
+    }
+
+    debug('_parseAuth: result: true')
+    return true
+  }
+
+  _parseMessageId () {
+    const packet = this.packet
+
+    packet.messageId = this._parseNum()
+
+    if (packet.messageId === null) {
+      this._emitError(new Error('Cannot parse messageId'))
+      return false
+    }
+
+    debug('_parseMessageId: packet.messageId %d', packet.messageId)
+    return true
+  }
+
+  _parseString (maybeBuffer) {
+    const length = this._parseNum()
+    const end = length + this._pos
+
+    if (length === -1 || end > this._list.length || end > this.packet.length) return null
+
+    const result = this._list.toString('utf8', this._pos, end)
+    this._pos += length
+    debug('_parseString: result: %s', result)
+    return result
+  }
+
+  _parseStringPair () {
+    debug('_parseStringPair')
+    return {
+      name: this._parseString(),
+      value: this._parseString()
+    }
+  }
+
+  _parseBuffer () {
+    const length = this._parseNum()
+    const end = length + this._pos
+
+    if (length === -1 || end > this._list.length || end > this.packet.length) return null
+
+    const result = this._list.slice(this._pos, end)
+
+    this._pos += length
+    debug('_parseBuffer: result: %o', result)
+    return result
+  }
+
+  _parseNum () {
+    if (this._list.length - this._pos < 2) return -1
+
+    const result = this._list.readUInt16BE(this._pos)
+    this._pos += 2
+    debug('_parseNum: result: %s', result)
+    return result
+  }
+
+  _parse4ByteNum () {
+    if (this._list.length - this._pos < 4) return -1
+
+    const result = this._list.readUInt32BE(this._pos)
+    this._pos += 4
+    debug('_parse4ByteNum: result: %s', result)
+    return result
+  }
+
+  _parseVarByteNum (fullInfoFlag) {
+    debug('_parseVarByteNum')
+    const maxBytes = 4
+    let bytes = 0
+    let mul = 1
+    let value = 0
+    let result = false
+    let current
+    const padding = this._pos ? this._pos : 0
+
+    while (bytes < maxBytes && (padding + bytes) < this._list.length) {
+      current = this._list.readUInt8(padding + bytes++)
+      value += mul * (current & constants.VARBYTEINT_MASK)
+      mul *= 0x80
+
+      if ((current & constants.VARBYTEINT_FIN_MASK) === 0) {
+        result = true
+        break
+      }
+      if (this._list.length <= bytes) {
+        break
+      }
+    }
+
+    if (!result && bytes === maxBytes && this._list.length >= bytes) {
+      this._emitError(new Error('Invalid variable byte integer'))
+    }
+
+    if (padding) {
+      this._pos += bytes
+    }
+
+    if (result) {
+      if (fullInfoFlag) {
+        result = { bytes, value }
+      } else {
+        result = value
+      }
+    } else {
+      result = false
+    }
+
+    debug('_parseVarByteNum: result: %o', result)
+    return result
+  }
+
+  _parseByte () {
+    let result
+    if (this._pos < this._list.length) {
+      result = this._list.readUInt8(this._pos)
+      this._pos++
+    }
+    debug('_parseByte: result: %o', result)
+    return result
+  }
+
+  _parseByType (type) {
+    debug('_parseByType: type: %s', type)
+    switch (type) {
+      case 'byte': {
+        return this._parseByte() !== 0
+      }
+      case 'int8': {
+        return this._parseByte()
+      }
+      case 'int16': {
+        return this._parseNum()
+      }
+      case 'int32': {
+        return this._parse4ByteNum()
+      }
+      case 'var': {
+        return this._parseVarByteNum()
+      }
+      case 'string': {
+        return this._parseString()
+      }
+      case 'pair': {
+        return this._parseStringPair()
+      }
+      case 'binary': {
+        return this._parseBuffer()
+      }
+    }
+  }
+
+  _parseProperties () {
+    debug('_parseProperties')
+    const length = this._parseVarByteNum()
+    const start = this._pos
+    const end = start + length
+    const result = {}
+    while (this._pos < end) {
+      const type = this._parseByte()
+      if (!type) {
+        this._emitError(new Error('Cannot parse property code type'))
+        return false
+      }
+      const name = constants.propertiesCodes[type]
+      if (!name) {
+        this._emitError(new Error('Unknown property'))
+        return false
+      }
+      // user properties process
+      if (name === 'userProperties') {
+        if (!result[name]) {
+          result[name] = Object.create(null)
+        }
+        const currentUserProperty = this._parseByType(constants.propertiesTypes[name])
+        if (result[name][currentUserProperty.name]) {
+          if (Array.isArray(result[name][currentUserProperty.name])) {
+            result[name][currentUserProperty.name].push(currentUserProperty.value)
+          } else {
+            const currentValue = result[name][currentUserProperty.name]
+            result[name][currentUserProperty.name] = [currentValue]
+            result[name][currentUserProperty.name].push(currentUserProperty.value)
+          }
+        } else {
+          result[name][currentUserProperty.name] = currentUserProperty.value
+        }
+        continue
+      }
+      if (result[name]) {
+        if (Array.isArray(result[name])) {
+          result[name].push(this._parseByType(constants.propertiesTypes[name]))
+        } else {
+          result[name] = [result[name]]
+          result[name].push(this._parseByType(constants.propertiesTypes[name]))
+        }
+      } else {
+        result[name] = this._parseByType(constants.propertiesTypes[name])
+      }
+    }
+    return result
+  }
+
+  _newPacket () {
+    debug('_newPacket')
+    if (this.packet) {
+      this._list.consume(this.packet.length)
+      debug('_newPacket: parser emit packet: packet.cmd: %s, packet.payload: %s, packet.length: %d', this.packet.cmd, this.packet.payload, this.packet.length)
+      this.emit('packet', this.packet)
+    }
+    debug('_newPacket: new packet')
+    this.packet = new Packet()
+
+    this._pos = 0
+
+    return true
+  }
+
+  _emitError (err) {
+    debug('_emitError', err)
+    this.error = err
+    this.emit('error', err)
+  }
+}
+
+module.exports = Parser

node_modules/mqtt-packet/testRandom.js

@@ -0,0 +1,86 @@
+const mqtt = require('./')
+const crypto = require('crypto')
+const max = 1E5
+const start = Date.now() / 1000
+let errors = 0
+let packets = 0
+let randomPacket
+const firstBytes = [
+  16 * 1, // CONNECT
+  16 * 2, // CONNACK
+  16 * 3, // PUBLISH, QoS: 0, No Retain, No Dup
+  16 * 3 + 1, // PUBLISH, QoS: 0, Retain, No Dup
+  16 * 3 + 8, // PUBLISH, QoS: 0, No Retain, Dup
+  16 * 3 + 1 + 8, // PUBLISH, QoS: 0, Retain, Dup
+  16 * 3 + 2, // PUBLISH, QoS: 1, No Retain, No Dup
+  16 * 3 + 2 + 1, // PUBLISH, QoS: 1, Retain, No Dup
+  16 * 3 + 2 + 8, // PUBLISH, QoS: 1, No Retain, Dup
+  16 * 3 + 2 + 1 + 8, // PUBLISH, QoS: 1, Retain, Dup
+  16 * 3 + 4, // PUBLISH, QoS: 2, No Retain, No Dup
+  16 * 3 + 4 + 1, // PUBLISH, QoS: 2, Retain, No Dup
+  16 * 3 + 4 + 8, // PUBLISH, QoS: 2, No Retain, Dup
+  16 * 3 + 4 + 1 + 8, // PUBLISH, QoS: 2, Retain, Dup
+  16 * 4, // PUBACK
+  16 * 5, // PUBREC
+  16 * 6, // PUBREL
+  16 * 7, // PUBCOMP
+  16 * 8, // SUBSCRIBE
+  16 * 9, // SUBACK
+  16 * 10, // UNSUBSCRIBE
+  16 * 11, // UNSUBACK
+  16 * 12, // PINGREQ
+  16 * 13, // PINGRESP
+  16 * 14, // DISCONNECT
+  16 * 15 // RESERVED
+]
+
+function doParse () {
+  const parser = mqtt.parser()
+
+  parser.on('error', onError)
+  parser.on('packet', onPacket)
+  randomPacket = crypto.randomBytes(Math.floor(Math.random() * 512))
+
+  // Increase probability to have a valid first byte in order to at least
+  // enter the parser
+  if (Math.random() > 0.2 && randomPacket.length > 0) randomPacket.writeUInt8(firstBytes[Math.floor(Math.random() * firstBytes.length)], 0)
+  parser.parse(randomPacket)
+}
+
+try {
+  console.log('Starting benchmark')
+  for (let i = 0; i < max; i++) {
+    doParse()
+  }
+} catch (e) {
+  console.log('Exception occurred at packet')
+  console.log(randomPacket)
+  console.log(e.message)
+  console.log(e.stack)
+}
+
+function onError () {
+  errors++
+}
+
+function onPacket () {
+  packets++
+}
+
+const delta = Math.abs(max - packets - errors)
+const time = Date.now() / 1000 - start
+console.log('Benchmark complete')
+console.log('==========================')
+console.log('Sent packets:', max)
+console.log('Total time:', Math.round(time * 100) / 100, 'seconds', '\r\n')
+
+console.log('Valid packets:', packets)
+console.log('Erroneous packets:', errors)
+
+if ((max - packets - errors) < 0) console.log('Excess packets:', delta, '\r\n')
+else console.log('Missing packets:', delta, '\r\n')
+
+console.log('Total packets:', packets + errors)
+console.log('Total errors:', errors + delta)
+console.log('Error rate:', `${((errors + delta) / max * 100).toFixed(2)}%`)
+console.log('==========================')

node_modules/mqtt-packet/types/index.d.ts

@@ -0,0 +1,257 @@
+import EventEmitter = NodeJS.EventEmitter
+import WritableStream = NodeJS.WritableStream
+
+export declare type QoS = 0 | 1 | 2
+
+export declare type PacketCmd = 'auth' |
+  'connack' |
+  'connect' |
+  'disconnect' |
+  'pingreq' |
+  'pingresp' |
+  'puback' |
+  'pubcomp' |
+  'publish' |
+  'pubrel' |
+  'pubrec' |
+  'suback' |
+  'subscribe' |
+  'unsuback' |
+  'unsubscribe'
+
+export declare type UserProperties = {[index: string]: string | string[]}
+
+export interface IPacket {
+  cmd: PacketCmd
+  messageId?: number
+  length?: number
+}
+
+export interface IAuthPacket extends IPacket {
+  cmd: 'auth'
+  reasonCode: number,
+  properties?: {
+    authenticationMethod?: string,
+    authenticationData?: Buffer,
+    reasonString?: string,
+    userProperties?: UserProperties,
+  }
+}
+
+export interface IConnectPacket extends IPacket {
+  cmd: 'connect'
+  clientId: string
+  protocolVersion?: 4 | 5 | 3
+  protocolId?: 'MQTT' | 'MQIsdp'
+  clean?: boolean
+  keepalive?: number
+  username?: string
+  password?: Buffer
+  will?: {
+    topic: string
+    payload: Buffer | string
+    qos?: QoS
+    retain?: boolean
+    properties?: {
+      willDelayInterval?: number,
+      payloadFormatIndicator?: boolean,
+      messageExpiryInterval?: number,
+      contentType?: string,
+      responseTopic?: string,
+      correlationData?: Buffer,
+      userProperties?: UserProperties
+    }
+  }
+  properties?: {
+    sessionExpiryInterval?: number,
+    receiveMaximum?: number,
+    maximumPacketSize?: number,
+    topicAliasMaximum?: number,
+    requestResponseInformation?: boolean,
+    requestProblemInformation?: boolean,
+    userProperties?: UserProperties,
+    authenticationMethod?: string,
+    authenticationData?: Buffer
+  }
+}
+
+export interface IPublishPacket extends IPacket {
+  cmd: 'publish'
+  qos: QoS
+  dup: boolean
+  retain: boolean
+  topic: string
+  payload: string | Buffer
+  properties?: {
+    payloadFormatIndicator?: boolean,
+    messageExpiryInterval?: number,
+    topicAlias?: number,
+    responseTopic?: string,
+    correlationData?: Buffer,
+    userProperties?: UserProperties,
+    subscriptionIdentifier?: number | number[],
+    contentType?: string
+  }
+}
+
+export interface IConnackPacket extends IPacket {
+  cmd: 'connack'
+  returnCode?: number,
+  reasonCode?: number,
+  sessionPresent: boolean
+  properties?: {
+    sessionExpiryInterval?: number,
+    receiveMaximum?: number,
+    maximumQoS?: number,
+    retainAvailable?: boolean,
+    maximumPacketSize?: number,
+    assignedClientIdentifier?: string,
+    topicAliasMaximum?: number,
+    reasonString?: string,
+    userProperties?: UserProperties,
+    wildcardSubscriptionAvailable?: boolean,
+    subscriptionIdentifiersAvailable?: boolean,
+    sharedSubscriptionAvailable?: boolean,
+    serverKeepAlive?: number,
+    responseInformation?: string,
+    serverReference?: string,
+    authenticationMethod?: string,
+    authenticationData?: Buffer
+  }
+}
+
+export interface ISubscription {
+  topic: string
+  qos: QoS,
+  nl?: boolean,
+  rap?: boolean,
+  rh?: number
+}
+
+export interface ISubscribePacket extends IPacket {
+  cmd: 'subscribe'
+  subscriptions: ISubscription[],
+  properties?: {
+    reasonString?: string,
+    subscriptionIdentifier?: number,
+    userProperties?: UserProperties
+  }
+}
+
+export interface ISubackPacket extends IPacket {
+  cmd: 'suback',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  },
+  granted: number[] | Object[]
+}
+
+export interface IUnsubscribePacket extends IPacket {
+  cmd: 'unsubscribe',
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  },
+  unsubscriptions: string[]
+}
+
+export interface IUnsubackPacket extends IPacket {
+  cmd: 'unsuback',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  },
+  granted: number[]
+}
+
+export interface IPubackPacket extends IPacket {
+  cmd: 'puback',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface IPubcompPacket extends IPacket {
+  cmd: 'pubcomp',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface IPubrelPacket extends IPacket {
+  cmd: 'pubrel',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface IPubrecPacket extends IPacket {
+  cmd: 'pubrec',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface IPingreqPacket extends IPacket {
+  cmd: 'pingreq'
+}
+
+export interface IPingrespPacket extends IPacket {
+  cmd: 'pingresp'
+}
+
+export interface IDisconnectPacket extends IPacket {
+  cmd: 'disconnect',
+  reasonCode?: number,
+  properties?: {
+    sessionExpiryInterval?: number,
+    reasonString?: string,
+    userProperties?: UserProperties,
+    serverReference?: string
+  }
+}
+
+export declare type Packet = IConnectPacket |
+  IPublishPacket |
+  IConnackPacket |
+  ISubscribePacket |
+  ISubackPacket |
+  IUnsubscribePacket |
+  IUnsubackPacket |
+  IPubackPacket |
+  IPubcompPacket |
+  IPubrelPacket |
+  IPingreqPacket |
+  IPingrespPacket |
+  IDisconnectPacket |
+  IPubrecPacket |
+  IAuthPacket
+
+export interface Parser extends EventEmitter {
+  on(event: 'packet', callback: (packet: Packet) => void): this
+
+  on(event: 'error', callback: (error: any) => void): this
+
+  parse(buffer: Buffer, opts?: Object): number
+}
+
+export declare function parser(opts?: Object): Parser
+
+export declare function generate(packet: Packet, opts?: Object): Buffer
+
+export declare function writeToStream(object: Packet, stream: WritableStream, opts?: Object): boolean
+
+export declare namespace writeToStream {
+  let cacheNumbers: boolean
+}